how to make an os x yosemite boot installer usb drive
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How to Make an OS X Yosemite Boot Installer USB DriveTRANSCRIPT
Oct 16, 2014 - 280 Comments
How to Make an OS X Yosemite BootInstaller USB Drive
Now that OS X Yosemite is available, many users may wish to create a bootable installer drivefrom something like a USB flash thumb drive or another disk. This allows for several things, theability to upgrade multiple Macs without having to re-download the installer, the ability to performa clean install, and also the convenience of having a separate bootable reinstallation drive in theevent you need it for serving a Mac.
Creating a Yosemite installation drive thatis bootable is quite simple, but it’s amultiple step process. Before youbegging, make sure you have thefollowing basic requirements met:
Requirements
A USB Flash Drive that is 16GB orlarger which you don’t mind formatting
The “Install OS X Yosemite.app”launcher in the /Applications/ directory
of the Mac (downloaded from the App Store, but not installed)
Of course, we’re assuming the destination Mac(s) that are going to get Yosemite are compatible.Basically, if the Mac is capable of running OS X Mavericks, it is capable of running OS XYosemite too.
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How to Create a Bootable OS XYosemite Installer Disk in 2 StepsFor the purposes of this walkthrough, we’re going to use a 16GB USB flash thumb drive, butyou’re free to use whatever you want, and you could even use an external hard drive if you reallywanted to. The convenience of a portable flash drive is undeniable so it’s preferred if you’regoing to be updating multiple Macs. Let’s get started:
Step 1: Format the USB Drive to be BootableThis is going to format the drive so that it will be a bootable installer, without doing this the drivemay not be bootable. If you don’t want to erase the drive, find one you don’t mind formattinginstead. When you format a fresh drive on a Mac it becomes labeled as “Untitled” so we’re goingto assume that the boot destination drive is named Untitled as well. If for some reason you haveanother drive named Untitled, change the name or don’t use it.
1. Connect the USB drive to the Mac and launch Disk Utility, then select that USB drive fromthe left side drive list (be sure you select the USB drive you want to make the bootableinstaller from)
2. Click on the “Erase” tab and format the drive as “Mac OS Extended (Journaled)”, thenchoose “Erase” and confirm
3. Next go to the “Partition” tab and under ‘Partition Layout’ click on the pulldown menu,changing it from “Current” to “1 Partition”
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4. Change the name to “Untitled” from ‘Untitled 1’ then click on the “Options” button
5. Choose “GUID Partition Table” as the partition scheme and choose “OK”
6. Click “Apply” and confirm the creation of the partition
7. Quit out of Disk Utility when finished
Now that the drive is ready, you can move on to making the actual installer.
Step 2: Making the OS X Yosemite Installer DriveThe next step will actually make the installer drive from the previously formatted USB disk. If youalready have the OS X Yosemite installer application in the /Applications/ folder on the Mac, youcan skip directly to step 3:
1. Download OS X Yosemite from the Mac App Store, it’s free (direct link) – DO NOTINSTALL IT YET
2. When the download completes and the “Install OS X Yosemite” app launches, quit out of itimmediately
3. Launch Terminal app and enter the following command exactly, copy and paste works fine:
sudo /Applications/Install\ OS\ X\
Yosemite.app/Contents/Resources/createinstallmedia --volume
/Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\
Yosemite.app --nointeraction
4. Enter the administrator password when requested (this is required to use the sudocommand – the password will not show up and it looks as if you’re not entering anything,that is normal behavior for the command line), then hit the RETURN key to start making theinstaller
5. You’ll see a series of message like the following, let it finish until you see the “Done”message – this may take a while as multiple GB of data have to be transferred:
"Erasing Disk: 0%... 10%... 20%... 30%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done."
6. When finished and the terminal reads “Done”, exit out of Terminal, you’re ready to use thebootable installer drive
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That’s all there is to it. Your freshly made OS X Yosemite install drive will be visible in the MacFinder:
Now you just need to boot from the freshly made OS X Yosemite drive, do that by rebooting theMac and holding down the OPTION key and selecting the “Install OS X Yosemite” drive uponboot.
If the drive does not boot, you almost certainly skipped the first step which was to partition thedrive as GUID, or perhaps interfered with the syntax in the command. You can go through theprocess again to be sure.
This allows you to update any version of OS X from Snow Leopard, Lion, Mountain Lion, or
Mavericks, directly to OS X Yosemite, with the installer that was just made. You can also perform
a clean install (which we separately address in a thorough walkthrough here), or updatemultiple Macs without having to download it from the App Store again. Be sure to always backup the target Mac before updating OS X, whether to OS X 10.10 or any other version, you can
follow detailed instructions on how to prepare a Mac for OS X Yosemite here. Enjoy OS XYosemite!
The aforementioned steps have been tested repeatedly and are confirmed to work flawlesslywith the OS X Yosemite final release. If you have any issues, run through the steps again, orleave a comment with your specific error. If you know of an easier way, let us know in thecomments too!
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Related articles:Stuck in Yosemite with OS X InstallerDrive and a Missing OS X MavericksPartition? Here’s the Fix
How to Clean Install OS X Yosemite
How to Make a Bootable OS X Yosemite Beta USB Install Drive
How to Downgrade OS X Yosemite Back to OS X Mavericks
Posted by: Paul Horowitz in Mac OS X, Tips & Tricks
280 Comments» Comments RSS Feed
Stan-O says:October 16, 2014 at 5:48 pm
3631
605
I just have done the same, before this was posted and it worked with an 8Gb drive just aswell.
Reply
EricW says:October 17, 2014 at 2:06 am
This is exactly the information I would have expected OSX daily to provide. Thank youfor the info and this was my only question.
Reply
charles ghareh says:March 7, 2015 at 8:47 am
i have a simple problem,my hard drive jus got damaged and had to change it and my imac is when i bought itused to run on os lion ( the old version ) and now i changed the drive but i cantdownload the lion cause its not available on app and i cant run another installer likeyoso or other versions of macintosh what can i do ?
Reply
Wickedjargon says:May 19, 2015 at 4:49 pm
do a google search on ‘kick sass torrents’ and/or ‘priatebay’ and search to see ifyou can find a copy there.
Reply
Prescott Perez-Fox says:October 16, 2014 at 7:03 pm
You can also use a drive that’s only 8GB. I just did it and it’s installing now.
Reply
Prescott Perez-Fox says:October 16, 2014 at 7:04 pm
Oops, looks like someone else said the same thing.
Reply
OSX noob says:October 16, 2014 at 9:02 pm
Make sure your HD partition isn’t called Untitled – as mine was
Reply
murphy says:November 22, 2014 at 7:48 pm
LOL – thanks for the tip and thats unlucky 😉
Reply
chris says:February 24, 2015 at 1:49 pm
I suspect my HD partition is called untitled as I am getting error after running the scriptsaying Volume/untitled is not the mounted volume ??
what do you do to fix this
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Paul Johnson says:February 26, 2015 at 5:10 am
Did you receive a reply Chris?
Reply
Nathan says:March 1, 2015 at 7:01 am
What I did was to find –volume /Volumes/Untitled segment of the command andchange it to (putting the quotes in) –volume “/Volumes/Untitled 1”. The reason forthe 1 and the quotes is that the mount table sees /Volumes/Untitled 1 as themount point.
HTH
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jj says:April 7, 2015 at 8:18 pm
I have tried the 1 and the quotes and its not working for me….any otheridea someone?
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Andy N says:May 20, 2015 at 6:13 am
Note: when you change the name to Untitled from Untitled 1 makesure to erase both the “1” and the preceding space.I am not sure how the application handles this and new the volumename may contain the trailing space creating the “unknown volumeerror”.
Travis says:May 1, 2015 at 6:53 am
Awesome. This tip just worked for me, thanks!
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Blaine says:June 6, 2015 at 11:17 am
THANK YOU! I have made bootable USB’s so many different ways butthis route with Yosemite seems the best way with the“createinstallmedia” tool / terminal command. Ive been havingproblems fully executing the process and DELETING THE _ (space) aswell when erasing the “1” in Untitled 1 was my problem as well. Had tosay thanks and try to hi light your fix for me in case other may have theproblem.
Steffan Perry says:July 2, 2015 at 8:28 am
The quotes are not required, simple escape the space as such:
/Volumes/Volume\ 1
Reply
Tommy says:July 25, 2015 at 9:56 am
Yup, did the same, renamed mine from UNTITLED to Untitled and got the error/Volumes/Untitled is not a valid volume mount point.
Leave it in capitals….
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pab says:July 25, 2015 at 10:30 am
The name in the command must match the destination drive name exactly
Reply
Trevor says:October 16, 2014 at 9:36 pm
i go through all the steps and it copies the data but the drive does not show up for me toboot from it
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roundart says:October 20, 2014 at 9:41 pm
Same problem. All I see is my bootcamp drive, my main mac os drive (mountain Lion)and my recovery disk. No Yosemite installl disk. I am holding the option key (obviously,because I see the other disks)
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Shane says:October 31, 2014 at 12:57 pm
I ran into the same issue. I am, by no means, an expert when it comes to thisstuff. I read as much as I can on these sites and discover things about mymachine through careful trial and error.
That said, my USB drive did not appear as an option to boot from. I unpluggedmy external and plugged it back in, which my Mac then recognized.
I was concerned this might corrupt the files on my external, but everything turnedout fine. Not sure why it was not recognized upon restarting, but simplyunplugging and plugging it back in did the trick.
If someone with more knowledge than me thinks that’s a terrible idea, pleaserespond. This method worked for me so I figured I’d share, but I’d hate to ruinsomeone’s day with bad advice. Just trying to help!
Reply
kylek says:November 11, 2014 at 3:51 am
You may want / need to revisit the first step in the article, and double checkthat you are using a **GUID** Partition when erasing/partitioning your drive.I am not trying to insult intelligence, and you have probably already donethis, however, this is a frequently overlooked step for MANY people, and isalso the easiest fix. Your Mac won’t boot from a Master Boot Record (MBR)drive without significant work on your part. I only managed this once, but Iam by no means a pro with Mac. I tend to be a little better with Windows.
I experienced a problem when I followed the directions with an eight GBdrive. I saw that others said that it worked, so I tried it; it installed to thedrive properly, but I had trouble booting on one of the computers we havefor interns (2010 MBP, 2.4GHz, 16 GB RAM). Although it doesn’t seem like abig change, when I used a 16 GB drive, it worked first shot. It will also workwith an SD card on every one I tried.
If you, or anyone else, is having trouble and would like to double check thatyou have a GUID Partition Table, open your Disk Utility tool –> Click thedrive name — NOT the partition on the drive — but the one which is left-aligned. (ex. (mine is: 16.04 GB APPLE SD Card…)) –> Partition will be thecenter option in the main window for the drive, but will not appear if you arein the partition. –> Change “Partition Layout” from “Current” to “1 Partition”.–> Below the lower-right corner of the graphical depiction of your disk, clickon “Options…,” and select the first option “GUID Partition Table.”
If one of the other two options is checked, click the top (GUID) option, makesure you select “Mac OS Extended (Journalized)” as the format, and changethe name from “Untitled 1” to “Untitled.” When you click “Apply” your diskwill be wiped clean, and you can copy / paste the information from the firstbox (sudo through nointeraction) under the second step. Wait for it to copyagain, and give it a shot.
Reply
charles ghareh says:March 7, 2015 at 8:51 am
i have a simple problem,my hard drive jus got damaged and had to change it and my imac iswhen i bought it used to run on os lion ( the old version ) and now ichanged the drive but i cant download the lion cause its not availableon app and i cant run another installer like yoso or other versions ofmacintosh what can i do ?well i have only one imac and no more laptop to download or makebootable usbwhat should i do ?
Mishendr says:October 16, 2014 at 10:52 pm
A question about the order of the first steps: isn’t creating a new partition layout alreadyerasing everything on the disk? Wouldn’t it be less steps (well… one actually) if you select 1partition, with options for GUID and then apply?
Or is this a old, old remnant of the Windows era-thinking….? 😳
Reply
Mishendr says:October 16, 2014 at 10:56 pm
BTW: Diskmaker X App has just been updated to support 10.10, it’s even easier that way tomake a OS X bootable disk.
Reply
Prairiewalker says:October 17, 2014 at 12:19 pm
Can you share the URL for the Diskmaker X app that works with the releasedYosemite?
I used the Terminal command to create a bootable installer for Yosemite on an 8GBflash thumb drive and it worked nicely, but I’d like to have the Diskmaker X app also.
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Patrick M says:October 18, 2014 at 9:23 am
Not to be a dick, but…
http://lmgtfy.com/?q=Diskmaker+X
Reply
Matt says:October 20, 2014 at 5:18 pm
“Not to be a dick, but lemme just be a dick”
Reply
Brad says:August 29, 2015 at 10:54 am
Lol!
simonka.says says:February 11, 2015 at 9:20 am
Nice advise. DiskMaker is the answer!!!Solved all problems like “You must specify both the volume and installapplication path.” and ” Failed to start erase of disk due to error (-9999, 0)”. Yes Imet both.Thank you!
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PCTech says:February 11, 2015 at 3:15 pm
This will happen if the machine you are attempting to create the installmedia on is not compatible with Yosemite. I ran into the same problemtrying to do this on my old Mini that topped on out 10.6.8… once Iattempted on my 2012 MBP it ran fine.
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Compufixgb says:March 25, 2015 at 2:46 pm
I was getting the same error until i used this code:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume/Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\Yosemite.app –nointeraction
try that
Wharf Xanadu says:October 16, 2014 at 10:59 pm
Awesome thanks, just made a bootable UsB disk out of a spare 16GB drive!!
Piece of cake!!
If you have an old boot drive you can rename it to Untitled and then run command linesyntax too. Boot with Option key and select Yosemite from the options of three
Yosemite!!!!! Yo. Sem. Uh. Tee!
Reply
Anonymous says:October 16, 2014 at 11:07 pm
If anyone has problems like “can’t find mountpoint” simply edit the terminal commandensuring to include a \ before each space.
So for example:
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
I would change /Volumes/Untitled to /Volumes/Untitled\ 1
Reply
Nuwan says:October 18, 2014 at 5:20 am
Thanks dude :*
Reply
Abe says:October 25, 2014 at 10:07 pm
Can you help me?This is what I get after I copy and paste into terminal from the original article:/Volumes/Untitled is not a valid volume mount point.
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Rbn says:October 28, 2014 at 3:01 am
Abe,
Maybe your volume is named “Untitled 1”? If its the case, then you need to typeas Anonymous said above:
“If anyone has problems like “can’t find mountpoint” simply edit the terminalcommand ensuring to include a \ before each space.
So for example:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume/Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app–nointeraction”
Reply
Efrain says:January 13, 2015 at 9:16 pm
I was having the same problem. Make sure your main HD is not titled “Untitled”as well. Mine was so I redid everything in this tutorial but named the partition inmy thumdrive “Myyosemitedrive” instead. I also edited the command for terminalto this:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume/Volumes/Myyosemitedrive –applicationpath /Applications/Install\ OS\ X\Yosemite.app –nointeraction
That should get you going.
Reply
Lars Justinen says:August 20, 2015 at 2:17 pm
“You must specify both the volume and install application path.”
Reply
Andy says:February 7, 2015 at 5:16 am
Great – thanks
Reply
Caraline says:October 16, 2014 at 11:37 pm
Thank you. You made this so easy and it works like a charm.
Reply
Greg says:October 16, 2014 at 11:52 pm
Mine has been copying the installer files for the last 8-10 minutes… still doing it. How longdid it take for you other guys?
Reply
Makoto says:October 17, 2014 at 1:58 am
It took about an hour for me.
Reply
Shilo Watts says:October 17, 2014 at 7:18 pm
16 minutes
Reply
luka says:October 21, 2014 at 11:03 am
I think this will depend on the version of the USB port on your pendrive.Here took 15 minutes: (USB 3.0).I think USB2.0 will take a little longer.
Reply
Kosta says:October 17, 2014 at 1:16 am
If I just copy the Yosemite.app into a USB drive and then copy it on to the target mac’sapplication folder, then run it from there, will this also work?
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Freerider says:October 17, 2014 at 2:53 am
Yes, copying the Install OS X Yosemite app to Applications will work, but you’ll need tochange the security settings to allow installing apps from everyone.
Reply
André says:October 17, 2014 at 5:04 am
It will
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Jimlat says:October 17, 2014 at 8:39 am
Worked for me…you just can’t boot from the USB drive…copy it to the desktop or runfrom the USB…
Reply
paul says:October 17, 2014 at 9:02 am
Yes that will work as well, however it would not be bootable. But to perform a simpleupdate rather than a clean install, that would be sufficient.
Reply
tortugahq says:September 20, 2015 at 3:05 pm
I think so.
Reply
Asad says:October 17, 2014 at 3:33 am
I am very thank full to osxdaily ….thank you very mooch love u gyz…
Reply
Asad says:October 17, 2014 at 3:34 am
much
Reply
Arjun says:October 17, 2014 at 5:15 am
sudo: /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia:command not found
this is what showing when i triedplease help
thanks
Reply
wowze says:October 17, 2014 at 8:57 am
It says “command not found” because you are not using the proper command, or youdon’t have the Installer in the /Applications folder
This is the command:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Here are the instructions. You should read the instructions:
http://osxdaily.com/2014/10/16/make-os-x-yosemite-boot-install-drive/
Reply
Abe says:October 25, 2014 at 10:13 pm
I followed the instructions to the point and after I copy and paste the commandin terminal this is what I get:/Volumes/Untitled is not a valid volume mount point.
Can you help?
Reply
Adel says:October 17, 2014 at 5:48 am
sudo /DDMac/Applications/Installer\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Yosemite –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeractionCommande not foundwhat is rong ?
Reply
rong? WRONG says:October 17, 2014 at 8:54 am
This is the command:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Reply
Adel says:October 17, 2014 at 6:55 am
hi everyoneit’s ok i did this change and it works.sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Reply
Catherine says:May 28, 2015 at 10:04 am
In a line of command, even the spaces are important. Many people forget that. Itworked perfectly for me thanks to OS X Daily.And depending on your keyboard, typing— may have a different outcome.
Reply
TTTT says:October 17, 2014 at 7:52 am
I past this:
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Not worked
“You must specify both the volume and install application path. ” ????
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itb says:October 17, 2014 at 8:53 am
Correct, you need to rename the drive to “Untitled” (the default when it is formatted)as outlined in Step 1.4, then use the proper command for that name. Or if you’re goingto continue to keep the drive as Untitled 1, escape the character properly:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Reply
Anastasya says:November 25, 2014 at 6:17 am
Mine is still showing:You must specify both the volume and install application path.
Any suggestions?
Reply
inbto says:November 25, 2014 at 9:39 am
Go to the App Store > Updates > look next to OS X Yosemite and click onthe “Upgrade” button
That’s what you should do, this is too complex this is way advancedtechnical stuff, most users are not fit for this making of a USB boot installer.
Reply
Anastasya says:November 28, 2014 at 2:34 am
Are you like me?
Catherine says:May 28, 2015 at 10:08 am
You can use DriveMaker X (downloading the corresponding versiondepending on you version of OS X. It’s a donation ware free but youcan donate) and it will do the job for your. But doing the thing yourselfteaches your more and anyway you’ll still have to learn how toproperly format a usb drive for Yosemite.
Td says:February 26, 2015 at 1:22 pm
i solved my by renaming the Untitled 1 from patition 1 to “Untitled” in DiskUtility then apply. after this, i quit the Disk Utility and copy the code asstated in the instruction and it worked….:)
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume/Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\Yosemite.app –nointeraction
Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…Copy complete.Making disk bootable…Copying boot files…Copy complete.Done.
Reply
Compufixgb says:March 25, 2015 at 2:47 pm
I was getting the same error until i used this code:
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
try that it should work
Reply
TTTT says:October 17, 2014 at 8:00 am
This worked. THANK YOUUUU
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Reply
Abe says:October 25, 2014 at 10:22 pm
I just copied your command and I get the same message:You must specify both the volume and install application path.
Any help?
Reply
James says:October 17, 2014 at 9:04 am
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Reply
Kurt Hanson says:October 17, 2014 at 10:22 am
Another utilitarian tip.
Glad I found this website.
Reply
Bill Luckie says:October 17, 2014 at 12:01 pm
I followed the instructions and never did see anything after “Copying installer files to disk”in Terminal. I exited Terminal and looked at the USB Drive and it appeared all required fileswere there, and it did boot without any problem.
Reply
Jalal says:October 17, 2014 at 12:23 pm
Thank you guys for fast update on your site. 😉
Reply
Ahmed Abunuwara says:October 17, 2014 at 12:33 pm
I got an (Error code 112)
Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…Copy complete.Making disk bootable…Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code 112)Mount of outerdmg failed.Done.
Reply
Ahmed Abunuwara says:October 17, 2014 at 12:33 pm
Is Yosemite installer dose install HD Recovery Partition?
coz i deleted accidentally
Thanks
Reply
Scott says:October 17, 2014 at 4:43 pm
Tried this twice and both time this is the result.
Scotts-MacPro:~ Twitchy$ sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –
applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeractionPassword:Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…The copy of the installer app failed.
Reply
oaul says:October 17, 2014 at 4:48 pm
Interesting, try reformatting the destination drive, HFS+ Journaled, set to GUID, trycommand again. Or try another drive.
Has worked flawlessly for me with multiple attempts on multiple USB flash drives, allhave been 16GB or greater though. Perhaps the destination disk does not haveadequate storage? Some say 8GB works… but it failed for me a long time ago withML so I went to 16GB only for installers.
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Scott says:October 18, 2014 at 11:02 am
Tried the above procedure all over again this morning using a Kingston 32gbflash, worked fine. Go figure!
Reply
Clyde says:October 20, 2014 at 8:00 am
I had the same error. Unfortunately, my mac now does not detect my pen drive.
Reply
Jey says:October 17, 2014 at 5:08 pm
will it kill the windows installation beside the osx maverick if I upgrade to yosemite? I haveinstalled windows 8 with bootcamp.
Reply
dasdgs says:October 17, 2014 at 6:57 pm
No not unless you overwrite Windows 8
Reply
Helmut says:October 17, 2014 at 6:12 pm
I typed this into terminal
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
I get a message saying: You must specify both the volume and install application path
What have I done wrong?
Reply
kermop says:October 17, 2014 at 6:55 pm
You’re using the wrong command and not the one provided. Check your syntax, youare not escaping the 1 and you are not using a double-dash. This is just one smallexample of why it’s important to use proper syntax.
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1\ –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Follow instructions for best results, don’t deviate from recommended advice.
Reply
khalil says:November 7, 2014 at 3:04 pm
wtf it still says cant specify loction and i have the\1 and everytrhing this is pissingme off I put the write command
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Anastasya says:November 25, 2014 at 6:21 am
Having the same problem
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newtomac says:October 17, 2014 at 7:36 pm
Diskmaker X App worked like a charm.
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swedane says:October 18, 2014 at 12:15 am
Followed the instructions to a tee and it worked like a charm.
This old lady is overjoyed by learning something I considered to be foreign, thanks for that!
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vampyren says:October 18, 2014 at 12:24 am
Thank you , just what i needed, its now copying to USB drive, will install later tonight once imade backups.
Great step by step guide!
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Eridan says:October 18, 2014 at 3:44 am
You can use 8 GB USB drive, too. Works without problems.
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r00t says:October 18, 2014 at 4:30 am
work for me legit….,
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Josh says:October 18, 2014 at 5:04 am
Would be cool if you could run an article on how to go from Yosemite (the ugliest OS Applehas ever released) back to Mavericks. That’s the problem I and many others have beenfacing … and I used your excellent instructions for making a bootable USB drive withMavericks OS … and then use that to install over Yosemite, to return my Mac to its formerglory.
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Kivinprod says:October 18, 2014 at 9:04 am
Failed to start erase of disk due to error (-9999, 0).A error occurred erasing the disk.
tired it on two different USB drives.. same error message
what am I doing wrong?
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xGigantorx says:October 18, 2014 at 11:07 am
You need to be on Mavericks to make the USB installer disk.
Try http://liondiskmaker.com/ instead.
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Mac mini says:October 18, 2014 at 12:18 pm
Getting same error, any suggestions, tried different USB? Than ks
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Timothy Jack says:October 30, 2014 at 9:54 pm
Thanks for the succinct write up!
I too had this issue:—Failed to start erase of disk due to error (-9999, 0).A error occurred erasing the disk.—
This is because I was using an older system (10.6.8 Snow Leopard Mac). Which won’twork.
Try using a newer Mac OS. I got it to work, using another computer that already hadYosemite on it.
It might be worth noting this in the article for those that find this in the future.
Thanks,TJ
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petre says:February 17, 2015 at 1:20 pm
Make sure the command line current directory is not in the flash drive(/Volumes/Untitled or your flash drive name). It will fail to lock the drive. in mycase this was the issue. I created the flash installer for Yosemite using aMountain Lion (10.8) with createinstallmedia.
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petre says:February 17, 2015 at 1:22 pm
and also other application using the flash drive.
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themanfromuncle says:October 18, 2014 at 9:40 am
Worked perfectly here.On an 8GB USB stick.
Creating the stick after pasting the terminal command took around 25 mins. (15″ rMBP late2013).
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xGigantorx says:October 18, 2014 at 11:03 am
I have an iMac 2009 and when I installed Yosemite it spit out an error. Asked me to reboot. Irebooted and it would not boot. No recovery boot option either. Just a kernel panic eachtime I try to boot.
My only other backup is my girlfriend’s old Late 2006 Macbook Pro (not compatible withYosemite). First I had trouble obtaining the Yosemite install media. Found it on the netbecause the App Store won’t even let you download it with a system that is not compatible.Then I got to step 2 in the post above. I received an error basically stating that you neededto have OS X 10.9 Mavericks installed. Great, I’m on 10.6 on this MacBook Pro.
End of the story. Download Liondiskmaker.com and it saved my ass a ton of headachesand trouble. Check it out
http://liondiskmaker.com/
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Ludo says:October 18, 2014 at 3:05 pm
Hey I’m getting an error when I try to tun the install. It goes “This copy of the Install OS XYosemite application can’t be verified. It may have been corrupted or tampered with duringdownloading.” Anyone have a solution this this problem? Using a late 2009 MacBook pro
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hashy says:October 18, 2014 at 3:26 pm
Wow that’s a curious error. Did you get the OS X Yosemite Installer from the Mac AppStore? If not, you may want to check the MD5 hash of the Yosemite Installer.DMG fileto be sure it’s intact as how it arrives from Apple. Easy way to do that is with theopenssl command:
% openssl md5 /Applications/Install\ OS\ X\Yosemite.app/Contents/SharedSupport/InstallESD.dmg
MD5(/Applications/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg)=8d3187fa7699366e1723c28abd78acc8
So, does the OS X Yosemite InstallESD.dmg file has a different MD5 sum?
You can learn more about checking MD5 sum here:
http://osxdaily.com/2009/10/13/check-md5-hash-on-your-mac/
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tapio says:October 21, 2014 at 12:20 pm
I have the same problem as Ludo, I got the Yosemite installer from App store.MD5 is different though
MD5(/Applications/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg)=45990cf5738de8e329ebf2652564689d
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tapio says:October 21, 2014 at 12:23 pm
At least this solution did not help -> http://support.apple.com/kb/TS5307
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Ludo says:October 18, 2014 at 3:14 pm
For anyone having the issue I had above. Find a way to open terminal and you can set thedate by entering the line:
Date 101818132014
That’s october 18 6:13 pm 2014 and now it’s working!!
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Samuel says:October 20, 2014 at 12:30 pm
I have the same issue. SoI just set todays date/time in terminal?
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Matt says:October 21, 2014 at 3:12 am
Setting the date worked a charm to fix this error for me as well. I’m doing a cleaninstall onto a new SSD, and I’d disconnected the battery while upgrading the disk andRAM hence the date had reset to 2000.
Mac packages are signed, so the date has to be correct and within the validity periodof the signing cert.
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Neil says:October 22, 2014 at 10:14 pm
Ludo, you are a genius. I’ve been struggling to re-install the OS for more than a weekon a MacBook Pro where I replaced the HD (and unplugged the battery while I did it).
Thanks!
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Dan says:October 29, 2014 at 1:25 pm
+1I was banging my head on the mainframe over this one. Just setting the datefixed it.
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Ben says:October 24, 2014 at 3:04 pm
Same for me. Ludo’s solution worked fine. Thanks
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Daniel says:November 2, 2014 at 7:16 am
You are the best man! Change the date and be happy!
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eWeezie says:November 23, 2014 at 11:35 pm
Ludo! You’re Brilliant! Thank You very much.
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Richard says:January 22, 2015 at 8:43 pm
Thanks!!! Worked for me.
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luis says:October 18, 2014 at 5:43 pm
I followed the steps to create the usb drive, but now I am having trouble just loading the oldos. How would I go about loading the old OS? Running yosemite from the usb is slow. Iwant to just stick with the old os. Thank you.
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pau says:October 19, 2014 at 10:49 am
Take the USB stick out of the Mac and reboot without installing it, that will boot backinto OS X Mavericks, assuming you didn’t upgrade the old version of OS X anyway.And yes, running anything from USB would be slow, it belongs on the main hard disk.
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Dan says:October 18, 2014 at 9:59 pm
It worked with 5.5GB. I had a 32Gb USB drive and did not want to waste space. I originallyused a 16GB slot but after installation, I noticed that it only took 5.25GB of space, so Ifigured 5.5 is safe.
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Carl says:October 19, 2014 at 9:06 am
This approach worked great. Thank you.
Can I take a 125GB drive partition it with say 5 different partitions and install differentinstallers on each? And then from the boot menu chose which install I’d like – Yosemite,Mavericks, Mountain Lion etc?
Also, a related question, can I partition a larger 1TB drive and install different operatingsystems on each partition? So I could have one partition with Mountain Lion installed andanother with Mavericks (for legacy purposes)?
Cheers!
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ok says:October 19, 2014 at 10:36 am
yes
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Carl says:October 19, 2014 at 3:58 pm
Thank you. So in the terminal text I only change “Untitled” to “Untitled1”,“Untitled2” etc?
Many thanks!
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bawer says:October 19, 2014 at 9:29 am
please help i have done all of the above instruction and it went great but when i reboot mylaptop to boot the installer ,there is no boot on the usb
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Kapesh says:October 19, 2014 at 10:33 am
Here is how you can make an OS X Yosemite boot installer, and boot from thatinstaller USB. Don’t skip any steps, if you skip any steps it won’t work:
http://osxdaily.com/2014/10/16/make-os-x-yosemite-boot-install-drive/
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Ilan Aisic says:October 19, 2014 at 10:59 am
I did as instructed and got:…Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…Copy complete.Making disk bootable…Couldn’t mount dmg /Volumes/OS X Install ESD/BaseSystem.dmg (error code 112)Copyingboot files…Failed to copy kernelcache, The file “kernelcache” couldn’t be opened because there is no
such file.Done.
Any advice?
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paul says:October 19, 2014 at 11:05 am
Re-download the OS X Yosemite installer from the Mac App Store, something isprobably wrong with the installer app if it is missing files.
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Pete says:October 19, 2014 at 12:40 pm
This is what I get still:
user$ sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1\ –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeractionYou must specify both the volume and install application path.
I am going to use this on a different internal HD.
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no says:October 19, 2014 at 1:43 pm
Wow wtf! How about a little bit more explanation of what that terminal command does andwhat to watch out for… This just formatted one of my windows harddrives! If you’re goingto do a step by step article than fing warn people before you tell them to do a step.Unbelievable.
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FFS says:October 19, 2014 at 10:20 pm
You had Windows running on the same USB drive that you expected to make abootable installer from, really? How would that be possible? Could you drink a glass ofmilk from a block of cheese? Or did you name your Windows drive “Untitled”?? Didn’tread the instructions? Why is reading comprehension so bad in America now? One ofthe requirements even says that you need a drive you don’t mind formatting. Readingis important. Backups are important too.
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Matt says:October 22, 2014 at 4:52 pm
What he’s saying is he had a Windows partition (probably from Bootcamp) called“Untitled” and it wiped it.
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Jonathan says:August 31, 2015 at 3:49 pm
You’re a moron.
If you don’t understand Terminal commands, don’t play with them.
It’s *you* that’s unbelievable.
Moron.
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Pete says:October 19, 2014 at 2:40 pm
Figured it out, this is what I used:
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app
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digitalcrow says:October 20, 2014 at 5:37 am
That was perfect !I knew about this but i couldn’t remember some switchesThank you !I’m creating my usb flash stick right now cause i need a freshly installed system.Also i want express a complaint about how apple install its software to new devices.When i bought my mac mini and booted it was slow then i made a fresh install and wasperforming very good. Don’t know what was the problem ? maybe something wrong aboutapple’s installation of osx ? not sure
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Lexxie says:October 20, 2014 at 5:41 am
Why 16GB or more stick? 8GB is more than enough: i made several already.Lex
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Matt says:October 20, 2014 at 9:20 am
I followed the steps exactly and this is the error I’m getting:Error erasing disk error number (-69888, 0)A error occurred erasing the disk.
What should I do?
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Craig says:October 20, 2014 at 11:11 am
Followed all the instructions and now waiting on Terminal to do its thing. It says “copyingfiles” but it’s been stuck on 1.22 GB of file size on the USB drive, which is a 16GB file. Iknow it takes a long time to transfer, but it’s just saying 1.22 GB for at least 20 minutes. Do Ineed to be more patient or start all over?
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Craig says:October 20, 2014 at 11:12 am
Instead of “16GB file” I meant “16GB drive.”
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Craig says:October 20, 2014 at 11:24 am
OK, it *finally* finished after about 45 minutes, most of them stuck on 1.22 GB. Nowapparently is all there, at 5.17 GB.Wouldn’t have been stressful if the file size would change every now and then.
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aaricus says:October 21, 2014 at 7:48 am
I am experiencing problems, as always, trying to update my Mac Pro. I think it’s a mid 2010,only 4 years old and very well spec’d that should give me years and years of use still withnearly 20 ghz in total.
But each and every time they release a new OS X, I have problems!
The crux of the issue is that the mid 2010 Mac Pro does not have the boot from Internetfeature, which exists in newer Macs and allows them to re-download a fresh copy of OS Xstraight from the ‘bios’ so to speak and off you go.
Well as Apple had not released this feature when my Mac Pro was released (they tookforever to release a new Mac Pro and so now I am locked into this older model, needless tosay within weeks of my purchase they released a new model), I have to either do theupgrade through a working OS X install & Apple have ceased to provide installation media,such as a DVD or USB even if you want to pay for it (which I think is stupid, it should beprovided for free to Apple Care customers as a minimum!, we did PAY for better level ofcare after all!).
So I have to go through this process and try to make my own USB install every single timeand every single time there is problems. I’m trying to make the install for the second timenow. Because the first time didn’t work.
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fabrice says:October 21, 2014 at 11:13 am
What is going wrong with my mac mini
When I’m trying update it it always goes wrong = Last time it ended @apple store
pc1:~ fabrice$ sudo /Applications/Install OS XYosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install OS X Yosemite.app –nointeraction
WARNING: Improper use of the sudo command could lead to data lossor the deletion of important system files. Please double-check yourtyping when using sudo. Type “man sudo” for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…Copy complete.Making disk bootable…Copying boot files…Failed to copy kernelcache, “kernelcache” couldn’t be copied to “.IABootFiles”.Done.
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r says:October 21, 2014 at 11:24 am
Your Installer may not have finished downloading. Get it from the App Store and installit the normal way.
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Kumar says:July 16, 2015 at 10:13 am
I have got message in first go. But Did format again and ran command. Itworked.
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JCS says:October 21, 2014 at 5:31 pm
Not sure what I’m doing wrong, but when a copy and paste into terminal, then enter mypassword this is the output
/Volumes/Untitled is not a valid volume mount point.
Any ideas what would be causing this?
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QA says:November 9, 2014 at 11:48 pm
I’m going to guess: either not having made a volume with a single partition namedUntitled -or- for some reason the partition you made is unable to be mounted. I wouldre-read the instructions carefully, and if you’re sure you’ve followed them correctly,maybe eject and re-mount your USB drive and try again.
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nick says:October 21, 2014 at 8:41 pm
this may be a stupid question. but I have already upgraded to Yosemite from Mavericks,and now I realize I would like to do a Clean Install. Do I follow the same instructions? Do Ineed to (or can I even) re-download the Yosemite Installer from the App Store? Or is italready on my system and ready to go? Just need to know if I have to do something elsebecause I definitely want to do a clean install. Thank you so much, awesometutorials/articles here, I will definitely keep coming back!
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Paul says:October 22, 2014 at 9:46 am
If you already updated to Yosemite on the Mac, which deletes the installer when OS Xfinishes updating, you would need to download the installer again from the App Store.
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nick says:October 26, 2014 at 1:09 pm
Paul, thank you, much appreciated!
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Felixecoga says:October 22, 2014 at 7:42 am
Can I still use the free space of USB as a normal storage device after this procedurewithout loosing the bootable benefit ??
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Dr.J says:October 22, 2014 at 9:38 am
After I created a boot drive of OS X Yosemite, is it enough for a clean install of old harddrive/OS of new hard drive? or do i need to install the previous mavericks first then use theYosemite boot drive?
Thank You
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Helge Fabricius says:October 22, 2014 at 12:10 pm
Hi, Great description.
Will the same command work to create the recovery partition by just changing the volumename?
ThanksHelge
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sreedhar says:October 22, 2014 at 9:18 pm
Last login: Thu Oct 23 09:40:17 on ttys000DRs-MacBook-Air:~ sreedhar$ sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction/Volumes/Untitled is not a valid volume mount point.DRs-MacBook-Air:~ sreedhar$
i got this after enter what is the cause
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Abe says:October 23, 2014 at 11:04 pm
I entered in terminal as described in the article:sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
I have an error:/Volumes/Untitled is not a valid volume mount point.
Can some one help me?
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heper says:October 24, 2014 at 12:27 pm
Just use the Installer from the Mac App Store, that is what you should do to upgradeto Yosemite. Back up your Mac first.
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Abe says:October 25, 2014 at 9:38 pm
Thanks for the reply but perhaps you didn’t get my point. I want to do a cleaninstall of Yosemite therefore I need to create a bootable stick. I know I can justupgrade off of the app store if I wanted to.
Any help on the message from Terminal is greatly appreciated, I really needcreate a bootable USB stick.
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JR Morales says:January 6, 2015 at 4:20 pm
Abe, you just need to add the following after the word “Untitled”:
\ 1
[There’s a space between the forward slash and the one]
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Teasip says:October 25, 2014 at 10:30 am
C/P string into terminal, asks for password, and then won’t accept admin password (Adminpassword known and correctly typed in on multiple occasions). Suggestions?
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peoplenoreado says:October 25, 2014 at 11:33 am
It says right on there, the password won’t show up in Terminal. You type it and hitReturn anyway to execute the command. Hiding the admin password typed into theTerminal is a security feature.
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Jesper Simonsen says:October 25, 2014 at 11:31 am
An 8 GB USB stick is enough to make the bootable Yosemite installer. (I just made one). Noneed for 16 GB stick.
PEACE
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John says:October 27, 2014 at 10:21 pm
If I have already installed OS Yosemite, can I still do a clean install, and wipe my hard driveand have OS Yosemite installed after wiping hard drive?
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Rbn says:October 28, 2014 at 3:07 am
Yes, you can. Just follow the same procedure stated in the article.
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Minsu says:November 1, 2014 at 3:25 am
WTF… that termial command formatted my exernal hdd that also named ‘untitled’…This would not happened if you used other names.. (WHY USE UNTITLED??? it’s socommon name-_-)
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QA says:November 10, 2014 at 1:00 am
Agreed! Why did you use Untitled (for your external HDD)… it’s such a common name.
The author of this article and you both – had the option of choosing a different name.
Nobody enjoys losing data and I do empathize. But in all fairness you share half of theaccountability in this case. :-/
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UNTITLED says:November 10, 2014 at 10:25 am
When you format a drive it names itself to UNTITLED, thus the name UNTITLEDis used here. Change the name if you want to, but if you can’t follow instructionsor know how to check for proper syntax you should not be using the commandline at all. Install OS X Yosemite from the App Store instead.
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Anastasya says:November 2, 2014 at 5:56 am
Ok, i have a problem. 1st time i did everything following the instruction and i haddownloading process in my terminal: Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…The copy of the installer app failed.
BUTright now i can’t format and erase my usb and try again because it’s called “Install OS XYosemite”. I’m trying to do Partition again and again using name Untitled but it’s showing“Partition failed with the error:
Couldn’t unmount disk.”
Then i’m trying to erase volume but: Volume Erase failed with the error:
Couldn’t unmount disk.
Can you help me please?
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nita says:November 2, 2014 at 8:49 am
So select the USB drive and format that, rather than the partition.
You may have corrupted the installer file if you see copy errors, or the destination drivemay be bad.
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Anastasya says:November 3, 2014 at 3:11 am
It was good before I followed the instruction. Well I downloaded an update fromapp store. Have no idea. Will try to format it. But how?)
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Aldreaon Smith says:November 3, 2014 at 7:31 pm
Doesn’t Work For Me, This Is What I Get:
wireless-152-13-40-199:~ SupremeTheGreat$ sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeractionErasing Disk: 0%…Error erasing disk error number (-69888, 0)A error occurred erasing the disk.
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Gonatim says:November 3, 2014 at 7:56 pm
The target disk is probably locked or corrupt, try a different USB flash drive. Alsomake sure the target USB volume is named “Untitled” and not something else.
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Snowman says:November 13, 2014 at 10:23 am
I had the same error when trying after a failure.
After getting the error I did a “ls /Volumes” and could that in addition to havingUntitled I also had a OS X Install ESD mounted. I ejected the USB. Plugged it back inand did a “ls /Volumes” again and OS X Install ESD was gone. I then ran the commandagain and it worked.
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Winstong says:November 4, 2014 at 6:54 pm
I am in mid way redownload OS X after erasing the HD. Now my friend told me to skip thatand create bootable USB. Can I boot up my macbook air and create bootable USB thenredownload OSX?Instead of redownload OSX and create bootable disk?
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gabriel says:November 6, 2014 at 7:06 am
Any ideas why this happened or solutions for it >
Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code 112)Mount of outerdmg failed.
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Cheryl Detrick says:November 9, 2014 at 2:27 pm
I have a similar error with different code:
Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code -4960)Mount ofouter dmg failed
The USB is now titled Install OS X Yosemite and the file is the correct size, but I don’twant to move forward if it won’t mount. Help please?
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P says:November 7, 2014 at 1:51 pm
Well when i make my USB stick and name it Untitled 1 i get this error on Terminal.
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction/Volumes/Untitled is not a valid volume mount point.
But when i name just Untitled everything is ok.
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QA says:November 10, 2014 at 1:17 am
OK, here’s a question I don’t think has been asked yet… what if I want to use my USB drivefor something else now, until that “someday” when I may need to use this installer? Can Iselect this volume “Install OS X Yosemite” in the Disk Utility sidebar and then click NewImage to make a .dmg of the entire contents of the USB drive and then reformat the USBdrive, use it as normal, then (someday) re-image the USB drive from the .dmg just as itwas? I’m not sure about the re-imaging part.
Here’s another one: Can I add another partition to this USB drive and use that otherpartition for storage, or will it interfere with the installer?
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Snowman says:November 13, 2014 at 10:36 am
I’ve downloaded the installer 3 times now. Once at home, once at work and once on adifferent machine and with all of them I get the “Failed to copy kernel cache” error
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gfresh says:November 13, 2014 at 3:52 pm
Made the installer on USB stick, however contents of the drive only has the Install OS XYosemite on it, none of the other elements these instructions show. (System, Library, Usr,etc). Did I do this incorrectly?
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oscar says:November 13, 2014 at 5:52 pm
when trying to open the partition layout tab it will not give me the option to open it! Why isthis?
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Mack Fackie says:December 17, 2014 at 7:04 pm
Try booting into a rescure environment and running fdisk against your drive. Delete allof the partitions and reboot.
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Brian says:November 13, 2014 at 7:51 pm
After entering the first command in Terminal, I enter my password in described in this site’sinstructions, and I get the following error message:
sudo: /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia:command not found
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Nye says:November 14, 2014 at 6:13 pm
I’ve created a Yosemite install disk using this method with no problems but now want to dothe same with Mountain Lion.
In the terminal string what should I change “Yosemite.app” to?
Is there a way to see what the system name for the installer is?
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joshst says:November 15, 2014 at 3:23 pm
I get to the Terminal part and it doesn’t work. says:
Failed to start erase of disk due to error (-9999, 0).A error occurred erasing the disk.
any ideas?
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Mario says:November 16, 2014 at 12:46 am
I get this reply on terminal:/Volumes/Untitled is not a valid volume mount point
what do I do?
thanks
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Omg says:November 16, 2014 at 10:18 am
Mario, you should update to OS X Yosemite from the App Store. That’s what youshould do. This is for advanced users with command line experience. If you can’tcorrect the syntax for your situation, and follow instructions step by step, you mostcertainly should not use this, you could break something.
Back up your hard drive and update with the App Store.
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Jonathan says:August 31, 2015 at 3:52 pm
+1
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Wkenddad says:November 16, 2014 at 7:42 pm
After I’m finished with the creation instructions and I view the Thumb Drive in “Finder” all Isee is the “Install OS X Yosemite.app” file.
Is there a trick to seeing the hidden/system files in the “That’s all there is to it. Your freshlymade OS X Yosemite install drive will be visible in the Mac Finder:” screenshot above?
It’s the 5th screenshot I believe.
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pua says:November 16, 2014 at 8:40 pm
You’d have to enable hidden files visibility to see this, it’s not practical for most users:
http://osxdaily.com/2009/02/25/show-hidden-files-in-os-x/
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Gabbo says:November 17, 2014 at 2:46 pm
Help, second time I post this. Anyone have an idea what went wrong and how to solve it.
Thanks!
Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code 112)Mount of outerdmg failed
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Jeremy says:November 19, 2014 at 1:58 pm
Strange problem.I made the boot drive. It worked. However I messed up some transferring of files from myold user and want to start over with a clean install again. This time the boot drive does notwork. I tried to make another and no dice. Nothing boots, just sits on a black screen.
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Angelo says:November 20, 2014 at 1:18 pm
Hello
Followed all the instructions above but It’s not working.At first I had the issue “Volumes/Untitled is not a valid volume mount point” and now “Youmust specify both the volume and install application path” and the syntax is correct..i copyand paste: sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 1\ –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction..from Kermop andI have the same message again..have you got any ideas?Thank you in advance!
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Matt says:November 22, 2014 at 6:05 pm
For me, the “Copying Installer files” step took a very long time. I thought it had hung. Butyou can open Activity Monitor, go to the Disk tab, and find createinstallmedia in the list. IfBytes Written is still going up, then it’s still working.
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metsoul says:January 31, 2015 at 6:34 am
Thanks Matt,This was super helpful and reduced my stress greatly!
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Mike says:November 23, 2014 at 6:46 am
Hi all
Anybody can help me… It appears allways the same error
Failed to start erase of disk due to error (-9999, 0).A error occurred erasing the disk.
Thank you all
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Gwp says:November 23, 2014 at 10:33 am
Double-check your command syntax and make sure you are pointing at the properEXTERNAL USB drive you want to use, it must be 16GB in size, not locked, andformatted for GUID. Error -9999 usually means the drive is locked or in use.
You should probably just update with the App Store.
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Anastasya says:November 25, 2014 at 6:43 am
I’m a loser 😀
Erasing Disk: 0%… 10%… 20%… 30%…100%…Copying installer files to disk…The copy of the installer app failed.
What can be wrong?
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Juan says:November 28, 2014 at 3:13 pm
Help! same problem here trying to create a flash drive installer. It gives me error
Failed to start erase of disk due to error (-9999, 0).A error occurred erasing the disk.
I am on a Mac Pro (early 2008) running 10.6.8. I have already downloaded Yosemite and Ineed to have it installed in both my Mac Pro’s (early 2008) running 10.6.8.
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Swisscheese says:November 28, 2014 at 6:10 pm
Juan,Creating the flash start-up drive may be futile in this case. I can’t boot up a Mac Pro(early 2008) from a working flash drive created on a new mac. aaricus above postedthat these earlier Mac Pros lack some facility that prevents them from recognising theflash boot drive. I am now resorting to clean-installing Snow Leopard, then updating to10.6.8 (required), and then updating to Yosemite from the flash drive (no clean install). Itrust that this will work, albeit cumbersome.
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tammy says:December 5, 2014 at 1:00 am
I did the above but still got the error message‘This copy of install OS X Yosemite application can’t be verified. It may have been corruptedor tampered with during downloading’
Can anyone help?! This keeps happening…
Thanks…
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Darwin says:December 5, 2014 at 2:01 pm
You should probably add in the article that you shouldn’t have another drive named“Untitled” also plugged in or partioned off from your main HDD. I blindly copy and pastedthe terminal entry and it formated the wrong drive. Not a big hassle for me, but wasted afew minutes.
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Rally says:December 5, 2014 at 2:11 pm
Disk Utility automatically labels formatted drives as “Untitled”, who names a hard driveUntitled by choice? And run who on earth runs a command line code snip withoutchecking syntax to make sure it applies to them?
Frankly if someone doesn’t know how to change a hard drive name they should not betrying to use the command line let alone making a boot installer or doing anythingcomplex. Use the App Store and update that way, this is way over their head.Reminds me of the people with Windows who deleted Internet Explorer and think theinternet is gone, good grief people, this is not for everyone.
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Lars Boldt says:December 7, 2014 at 11:16 am
Hi,
I can’t open old backup dvds in Yosemite, anyone with same problem?
When inserting dvds come in emty.
Lars
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Travis says:December 8, 2014 at 12:50 pm
POSSIBLE SOLUTION TO: You must specify both the volume and install application path
Ok, I’m kind of a noob at this, but I was getting the same error. However, after repeating allthe steps again, I realized I may not have erased the space after renaming the partitionUntitled. I erased the number 1, but not the space. Make sure there isn’t a hidden spaceafter “Untitled”
I didn’t read every comment, so my apologies if this was already covered.
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MoFu says:December 9, 2014 at 1:08 pm
I find it smarter to just install Yosemite with the installer to an external hdd or stick (dontknow the required size of the stick) then boot up the recovery partition on the externaldevice and install/update from that, no need to use terminal, and you will have an externalOSX to boot for diagnostic use as well (very usefull to recover data from an unbootableinternal drive, test software before installing or simply just have your own OS with youwhithout having your to bring your Mac ).
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Arjuna says:December 10, 2014 at 12:51 am
Hiya.got to the below step
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
WARNING: Improper use of the sudo command could lead to data lossor the deletion of important system files. Please double-check yourtyping when using sudo. Type “man sudo” for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:/Volumes/Untitled is not a valid volume mount point.
please comment what I’ve done wrong?
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Julian Woods says:December 13, 2014 at 8:31 am
I wanted to test Yosemite on an external drive before taking the plunge to upgrade myMacBook Pro from Maverick to Yosemite. I followed the instructions exactly and ended upwith (what looked like) a nice bootable Yosemite installer on a 16GB thumb drive labelled“Install OS X Yosemite”. After re-booting my Mac and choosing the installer drive, I choseto install the Yosemite on a suitably prepared external drive (Mac journaled, GUID partitionetc.). Everything worked fine until the progress bar showed “About a second remaining,”Then all progress stopped and I didn’t get the promised ‘reboot’.
However, as instructed in your other excellent post (http://osxdaily.com/2014/10/17/os-x-
yosemite-installation-stuck/) I waited—and waited. After about 4-5 hours of this a dialogpops up saying, “This copy of the install OS X Yosemite application can’t be verified. It mayhave been corrupted or tampered with during downloading.” When I click the dialog’s OK
button it simply reboots my MacBook Pro into its current system (which is Maverick).
I’ve tried to do the install on two separate external drives with the same result.
Guess something went awry with the original download from Apple and I have to trydownloading another copy. What is this “verification” that’s so important at the very end ofan install?
Anyone else had this problem? And is there any fix other than going through the hassle of asecond download from Apple?
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Max says:December 27, 2014 at 3:30 am
I had a similar problem. My issue turned out to be that I had a slightly older version ofthe Yosemite installer. I had created it a while back, and it was version 1.65. As oftoday (12/26) the version is 1.67. Somehow the installer knows to check to see if youhave the latest version. My suggestion to you is to download a fresh copy, and do it allover again. I was eventually able to get mine installed, and am using it to reply to younow. Happy Holidays.
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Richard Ward says:December 18, 2014 at 4:24 pm
You could specify the drive name with quotes and remove the need to rename.
Example: –volume “/Volumes/Untitled 1”
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Cheryl says:December 18, 2014 at 6:11 pm
tried several times and keep getting this:
unrecognized option `–volume/Volumes/Untitled’Usage: createinstallmedia –volume –applicationpath [–force]
Arguments–volume, A path to a volume that can be unmounted and erased to create theinstall media.–applicationpath, A path to copy of the OS installer application to create the bootablemedia from.–nointeraction, Erase the disk pointed to by volume without prompting for confirmation.
Example: createinstallmedia –volume /Volumes/Untitled –applicationpath“/Applications/Install OS X Yosemite.app”
Please help!!
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Anna says:December 26, 2014 at 11:21 pm
Hi there,
Thanks for such a descriptive method to achieve this. I am new to using a mac and waswondering if you could guide me with a question. I read in the steps described by youabove that in order to boot from the freshly made OS X Yosemite drive, one has to rebootthe Mac and holding down the OPTION key, select the “Install OS X Yosemite” drive uponboot.
So my question is that when we select the “Install OS X Yosemite” drive upon boot, andboot from there, does it delete the data which is right now on my unbootable internal drive?I am concerned about loosing data from my internal hdd and at the moment, i can’t eventake backups. So any clarity on this is really appreciated…
Thanks,Anna
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Wayne says:December 30, 2014 at 11:49 am
Hi, I have completed your guide correctly and all went well, except when I tried to selectinstall osx yosemite after boot from usb i get the following error…
“os x full marketing name cannot be installed on this computer”
Can someone please help as my mac is now formatted and out of action with no way ofrestoring if I can’t get this to work?
Thanks.
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Don says:December 30, 2014 at 12:04 pm
Use Internet Recovery to re-install OS X if you screwed up and tried to install thewrong version, thsi will reinstall a version which works on your Mac:
http://osxdaily.com/2014/12/14/reinstall-os-x-mac-internet-recovery/
Or better yet, use the BACKUPS you made. You did make backups like you aresupposed to, right?
If it’s telling you the computer can not run OS X Yosemite, then it can not run OS XYosemite and there is no about of magic you can do to change that. Systemrequirements are set system requirements.
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Wayne says:December 30, 2014 at 12:35 pm
@Don, thanks for the prompt reply Don.
My macbook pro can run yosemite as I had it running for over 6 months afterperforming an upgrade from mavericks, but the system had started to act up alittle probably due to subsequent upgrades over the years so I thought I wouldperform a clean install but then I got the error listed above…?
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Paul says:December 30, 2014 at 12:45 pm
Don has a good recommendation with System Restore. Reboot the Macand hold down Command+R or Command+Option+R to start the systemrecovery process would be your best bet if your Yosemite install drive doesnot work.
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Wayne says:December 30, 2014 at 12:55 pm
unfortunately it seems my MacBook pro does not support Internet restore as I only get aflashing folder icon with a question mark inside?
As I don’t have another Mac or a hard copy of any os x, is there a way I can use mywindows 7 machine to make another bootable os x USB or DVD?
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Don says:December 30, 2014 at 1:09 pm
Reboot and use Command+Option+R instead, you will need to connect to a wi-firouter and it will download the restore partition to begin recovery from the internet.
Otherwise use the boot volume you made and choose to Re-install OS X from there.You can not install OS X from Windows, no.
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Wayne says:December 31, 2014 at 6:56 am
Well I have had to revert back to my snow leopard DVD to get back up and running.
Have now successfully upgraded to Yosemite (again!) but for some unknown reason I canperform a fresh clean install with Yosemite on my late 2007 MacBook pro 17inch.
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Wayne says:December 31, 2014 at 7:23 am
*cant perform a clean install
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Mike says:January 6, 2015 at 2:31 pm
I had problems at first using this to create a bootable USB installer but after I copy/pastethe commands it went smooth after that I must have been typing something in wrong. Nonethe less it’s copying installer files now and done!!!Awesome thanks for the help
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Anonyms says:January 7, 2015 at 12:56 pm
IT TOOK 3 DAYS to find these instructions. I found lots of instructions as to how to do thisbut they were so filled with crap I had no need for and extraneous other info and junk andpoor graphics, I gave up. THANK YOU TO WHOEVER put this together – for yourSTRAIGHTFORWARD just simply put the instructions down way. Why is it so f’king difficultfor mostly men to set aside their egos and just write the damn instructions and find someother way to boost their egos or get attention. THANK YOU again for posting this.
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Grant says:January 14, 2015 at 3:15 pm
“IT TOOK 3 DAYS to find these instructions.”
Three days? It took me .62 seconds using Google.
Was glad to find the instructions, too, although I also had problem with the copy/paste. AsI’m making a Mavericks bootable USB, I had to replace “Yosemite.app” with“Mavericks.app”. Would have been nice to have it as unformatted text. But after typing inthe command (twice) it appears to be working.
It’s been more than 35 minutes, and I’m still waiting to find out if it will work. Would also begood to replace “this may take a while” with an estimate.
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danar says:January 14, 2015 at 5:28 pm
good info thanks
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Mary Coleen says:January 16, 2015 at 8:26 am
THANK YOU VERY MUCH! <3 <3
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DAVIDSDIEGO says:January 19, 2015 at 7:03 am
On installing Yosemite, I also replaced the battery on my old Mac and also received anerror, “This copy of the Install OS X Yosemite application can’t be verified. It may have beencorrupted or tampered with during downloading.”.
I found that I had to change the system date in Terminal. The site below helped me outimmensely.
https://bensmann.no/changing-system-date-from-terminal-os-x-recovery/
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AG says:January 25, 2015 at 7:49 am
Thanks for the info.Is there a way to partition the USB so that the OS X installer only takes up the space itrequires?I have a 16GB usb drive, but would like to put both the OS X installer and a Windows OSinstaller on that usb drive in two different bootable partition. Is that achievable?
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Eric says:January 27, 2015 at 1:52 pm
Will the terminal command work for Mavericks if I just substitute that for Yosemite and leaveeverything else the same?
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PreludePresto says:January 28, 2015 at 11:54 am
Does this specific command work for a reinstall as well? I’d like to do a clean reinstall of theYosemite.
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Piernine says:February 3, 2015 at 11:39 am
I followed your directions very carefully, copying and pasting the sudo command, 3 timeswith 2 different downloads from Apple and 2 different USB sticks. I get the following errorevery time.
Any suggestions?
Copy complete.Making disk bootable…Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code 112)Mount of outerdmg failed.Done.
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Reginaldo Marcilon says:July 24, 2015 at 11:59 am
Close the “Disk Utility.app” and the “Finder” before execute the command on theterminal. It works for me.
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Jordan T. Boehm says:February 7, 2015 at 9:21 pm
I must note that, pertaining to “Ahmed Abunuwara”‘s post, a new drive got rid of the“Mount of outer dmg failed” problem. I was using a Toshiba 512GB SSD which was havingthat problem, I switched to a Western Digital 250GB (non-SSD), and it worked with no error.Yay! Hope this helps other’s with the same issue. Now.. what the hell is up with this Toshibadrive!?
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kenji says:February 13, 2015 at 1:47 pm
I followed directions exactly but upon using Terminal.app the data wouldn’t load bringingback an error:
/Volumes/Untitled is not a valid volume mount point
I did some Googling and figured out naming the USB volume “Untitled” was the issue. Ichanged the name of the USB stick to YosemiteInstaller and exchanged that name for“Untitled” in the code typed into Terminal.app and it worked flawlessly.
Something else must be named Untitled on my machine causing the prob.
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Martina says:February 26, 2015 at 4:24 am
Hello,What can i do if i by mistake installed Yosemite and now I can’t find it anywhere. I trieddownloading it again from the app store (waited 4 hours) and still cannot find the OS XYosemite.app. Is tehre another way of saving Yosemite on a USB ?
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Yea says:February 26, 2015 at 9:30 am
You can re-download OS X Mavericks or OS X Yosemite from the OS X Yosemite App
Store like this: http://osxdaily.com/2014/12/30/re-download-os-x-mavericks-
installer-from-os-x-yosemite-app-store/
It will be in your Purchases tab to re-download, then end up in the /Applications/folder
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susie says:March 8, 2015 at 1:11 am
I ran the terminal message and put in my pswd then got a message that says:-bash:wonderwoman1: command not foundSusieEsevessMBP:~ suzesteves$
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Bill says:March 8, 2015 at 2:29 pm
Dumb question but are there blank character spaces in the command line?
As in after the slashes before “OS” and before “X” and before “Yosemite”
ns/Install\ OS\ X\ Yosemite.app –nointeraction
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Rob says:March 17, 2015 at 4:11 pm
I know this is an older post, But I am using it to wipe/clean install a mid 2010 Mac Mini. I’vetried a handful of times and after a long wait with the initial step (before rebooting) I get anerror that says “The Copy Of the install OS X Yosemite application can’t be verified, It mayhave been tampered with during downloading” Any Ideas?
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Rob says:March 17, 2015 at 4:13 pm
I get an error saying “This copy of the Install OS X Yosemite application Can’t be verified. Itmay have been tampered with during downloading”
Any Ideas?
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Rob F says:March 17, 2015 at 4:15 pm
I can’t seem to post this in the forum but I got this? “This copy of the Install OS X Yosemiteapplication Can’t be verified. It may have been tampered with during downloading”
Any Ideas?
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Paul says:March 17, 2015 at 4:18 pm
Yes, if you get the “can’t be verified” error, you can fix it with this:
http://osxdaily.com/2015/01/19/fix-os-x-install-errors-cant-be-verified-error-occurred-preparing-mac/
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Lana says:March 25, 2015 at 7:44 am
Hi,
I have been copying installer files to disk for 1 hour now. And it has still not finished. Is itnormal ? Do you think there is any problem?
HELP
Thanks,Lana
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Pireday says:April 10, 2015 at 11:08 am
Great It’s worked
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John says:April 10, 2015 at 3:09 pm
The install onto the USB drive had only one glitch and that may have caused a problem. Atthe reboot time the machine just sat there – and I could see the USB drive wasn’t powered,as if it had not been seen by the mac as a bootable volume.
So I powered down and powered up the mac forcing reboot
That seemed to work fine, the external drive was powered and recognized immediately andthe install proceeded. Everything works great (though slow) from the external drive.
HOWEVER
When I shut down and disconnected the external drive to boot back into the originalsystem, it booted up into the installer, trying to install Yosemite on my laptop hard drive. Imade the mistake of halting that install and went back to the external, and rebooted intoYosemite, then found the app on the old drive “installYosemite.app” and deleted it.
I think that was my big error.
When I tried to reboot the original disk it clearly wants to find something that is missing now– and it won’t boot, and it won’t go into any part of the install. I get a kernel level error, thenthe multi-language “There was a problem” message, but no successful progress.
Anyone have any idea how to repair that?
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Tom says:April 21, 2015 at 3:19 pm
These instructions are much easier to follow:
http://osxdaily.com/2014/10/16/make-os-x-yosemite-boot-install-drive/
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srishabh says:April 24, 2015 at 1:54 pm
I am trying to install a fresh copy of OS X Yosemite on my MacBook Pro, 13-inch, Mid-2012and the instructions given above are quite what I need. The only thing I have to ask is, doesall my Data and Applications stay? Or do they get deleted since a fresh copy of OS X isbeing installed?
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Lucky says:April 29, 2015 at 12:19 am
I did this with my external hd that had stuff on it and it looked like it was deleting my driveso I pulled the plug and now my drive seems messed up was it gonna erase my drive or isthere away to reverse this action.
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Scott Foster says:April 29, 2015 at 8:14 am
Hi,
The command does indeed format the drive and then place the installer files.If you used your external, this would have formatted the drive. Not the end of theworld. You have an arduous task ahead to recover your files.
Good luck.
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Zee says:April 29, 2015 at 8:11 pm
I have read all of the comments others have left who had the same problem and I have triedALL of them; none work. I still have this message:
“You must specify both the volume and install application path.”
HELP?
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Ademola says:May 1, 2015 at 1:58 am
Thank you for such in insight, it work for me though i have to change somethings like myFlash Drive name, my OS location
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AhitechAztek says:May 1, 2015 at 1:52 pm
I got it!!!! the whole problem is that when you copy directly from this page you don’t get the—only –I manually typed it in and made sure to make the —
worked like a charm!!!!
thanks ya’ll!
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AhitechAztek says:May 1, 2015 at 1:53 pm
I am referring to2 dashes.
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Liambrexton says:
May 26, 2015 at 3:58 pm
Wow I love this, at least I will now do my stuff de way I want it to be,a big thank you to youguyz
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DannyD says:June 2, 2015 at 7:56 pm
A big, big, BIG Thank You!! I used an SD Card instead of a thumb drive, and your methodworked flawlessly!! My old HD had frozen, so I went with a new SSD, but Apple’s “free”method wouldn’t allow me to download “Lion” for upgrading to “Yosemite”. It’s all goodnow, thanks to you!!
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Angry Mike says:June 12, 2015 at 11:22 am
Fixing up my wifey’s Mac and ran into several issues because I used a Samsung 850 asreplacement for the old drive. What I then realized was that I could use the net installer,open Disc Utilities and initialize that bad boy. From Lion I went ahead and used this tip andit is nothing but smooth sailing from here. Thanks a bunch for this guide! You rock.
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wingle says:June 15, 2015 at 8:25 am
Has anyone operating with Mavericks attempted to make a Yosemite installer USB driveusing the Yosemite installer download?Apple HT201372 indicates the createinstallmedia command is to work only with the versionof the OS X Installer app it came with. Does this mean to create Yosemite media the systemmust be running Yosemite?
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Wombat Commando says:June 15, 2015 at 9:38 am
Wingle. Considering that users update to OS X Yosemite from OS X Mavericks, hmm Isuspect you did not even read the article here, describing how to make a USB installerdrive for OS X Yosemite, from OS X Mavericks or OS X Yosemite, as long as you havethe Yosemite installer downloaded. This article answers your questions and shows youhow to create the installer drive with a USB disk of your choice.
http://osxdaily.com/2014/10/16/make-os-x-yosemite-boot-install-drive/
I would suggest reading the article and then following the steps precisely, if you cannot do that, then you should not try to make a USB installer and you should probablynot install OS X Yosemite either. Maybe wait for the OS X El Capitan installer and usethat in September.
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Harry Roberts says:June 18, 2015 at 5:06 pm
OMG… I am a double E who thinks he can provide this level of help to others…. but…. Ithink I have done died and gone to heaven…. THIS IS the way you do it up right…. all of the“issues’ that pop up are outliers that can be addressed in chat and comments as they arebeing done here. I followed it exactly and it worked flawlessly. Whoever the hell you are….well done… and you have my complete respect. Good gawd!!!!!!!! Kudos.
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Nahid valli says:June 28, 2015 at 2:27 am
I get the error of…Mount point
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Averil says:June 29, 2015 at 7:23 pm
did a copy and paste, entered password and gotcommand not found
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greatstory says:June 29, 2015 at 7:56 pm
So basically you did something wrong, or entered something wrong. The commandworks if it’s entered correctly, and if the installer is in place.
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Whales says:July 2, 2015 at 9:10 am
Hello guys. Im a newbie to mac and ive got a real problem on my hands. I have a 2009white macbook im trying to upgrade to Yosemite. However, I cannot boot into the macbookbecause I mistakenly erased my startup disk. Now I just made a bootable usb disk from awindows tool called TransMac but my macbook doesnt show this bootable disc when I tryto install from it. Any help please?
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Gery says:July 8, 2015 at 4:06 am
Is it natural for a 16GB SanDisk to take days to format. I have done it the way you explainsays, but is taken forever? I cant move on yet to partition tab, as this has been going on forabout a day. I didn’t expect that it took this long to format, I have “Mac OS Extended(Journaled)” highlighted, and it is done about half so far. Any ideas? If this is natural thencool, but was wondering
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Ron says:July 17, 2015 at 1:05 am
Mine took 5 seconds. I would put in a different machine and give it a different formatlike fat 32 then go back to the Mac to format properly.
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s2arto says:July 11, 2015 at 6:19 pm
Most people who are not Terminal savvy (like me) will neglect to delete both the “1” in“untitled 1” AND the space preceding it, as was my problem. This will result in Terminalreporting that “untitled is not a valid mount point”. There are several other comments to thiseffect, and it’s pretty much an essential step.
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Ron says:July 17, 2015 at 1:02 am
Very cool. Thanks for the article, it worked as stated. Mac noob here lol
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Janet says:July 21, 2015 at 7:33 pm
I got as far as the terminal, cut and pasted the commands, and at first it asked for pw. Ididnt read the part where you indicated that I wouldnt see the pw being entered. I did thesame command again and this time it says:
“/Volumes/Untitled is not a valid volume mount point.”
Now what?
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Mr. Unhappy says:August 2, 2015 at 4:30 pm
There is an introduced syntax error in the instructions provided here, specifically thescript that will not work when cut and praised into terminal.These instructions are not valid for many people, even when followed exactly.
Use the instructions:
sudo /Applications/Install\ OS\ X\
Yosemite.app/Contents/Resources/createinstallmedia --volume
/Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\
Yosemite.app --nointeraction
It worked perfectly for me the first time.
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Happy Pappy says:August 3, 2015 at 10:41 am
Actually, the command is identical. You pasting not following instructions isprobably your problem.
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled–applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled–applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
Same commands, identical.
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Janet Geren says:July 21, 2015 at 8:16 pm
Yay! I did it. I started over, formatted and partitioned the memory stick, renamed it toUntitled again and started over and this time it worked. Thank you soooo much!!!
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Harpreet Gill says:July 23, 2015 at 10:39 am
Hi,Thanks for sharing this great solution.I wanted clean fresh installation of Yosemite 10.10 on my macbook pro (16 GB Ram, 512SSD, i7). so, I erased old installation. Followed exact steps you mentioned (on other iMac)to create bootable usb. It boot the system up start installing Yosemite, but in the middle, itis failing with following message :“an error occurred while extracting files from the package essentials.pkg”It ask to try again but every time it fails with same error me message.
Please help me. Thanks in advance.
RegardsHarpreet Gill
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Kevin Lloyd says:August 8, 2015 at 1:29 am
Tried and got this error message. Any suggestions?
Couldn’t mount dmg /Volumes/Install OS X Yosemite/Install OS XYosemite.app/Contents/SharedSupport/InstallESD.dmg (error code 112)Mount of outerdmg failed.Done.
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Jason says:August 12, 2015 at 9:05 am
What is the problem with Yosemite?? I get the (error code 112) too and the cannot beverified every time…Testing is obviously not done properly.. I will forgo installing.
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Brian says:August 13, 2015 at 11:57 pm
Somebody please send me the “Yosemite setup app” I cant download mine. It keeps givingme an error message.
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khgyn says:August 14, 2015 at 10:31 am
you download yosemite from the app store, its 8gb nobody can send it to you
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JRJRJR says:August 18, 2015 at 9:34 pm
I followed these instructions exactly – twice – and both times when I option-boot, I just geta black screen and have to restart. Is it because I’m using only a 8GB drive? Everyone elsesaid 8GB worked fine.
I have Mountain Lion installer backed up on another 8GB drive, so I’ll try that one instead,for now.
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Kartik Agarwal says:August 23, 2015 at 2:09 am
Guys, how long did it take for all the files to be installed on to the disk? Mine has beengoing on for about 10 minutes now. Is that normal?
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Matt says:August 23, 2015 at 4:16 am
How long did it end up taking? Mine has been going for 40 minutes so far, still going.
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Corrected says:August 27, 2015 at 7:15 pm
The article instructions leave your USB drive as “Untitled” do not add a “1”
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Incorrected says:August 28, 2015 at 9:35 am
If you read the article on how to make a USB installer for OS X Yosemite, which youapparently have a hard time doing, it explains exactly why the volume is called“Untitled 1” and not “Untitled”. But whatever, wouldn’t want to bother you with literacycomprehension! Particularly with a technical matter, nah, why read when you can justassume and break something? LOL.
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WEC777 says:September 4, 2015 at 12:49 am
I had the same problem until I realized that there’s no space between“Resources/createinstallmedia”, so if you’re typing it in rather than copy/pasting, it makes adifference.
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Niall101 says:September 9, 2015 at 9:27 am
Thanks a lot buddy! Very clear and helpful instructions. You just helped me save anotherwise perfectly good laptop that was destine for the scrap heap
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Farmani says:October 6, 2015 at 1:48 am
hiwhen i was enter this command
” sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction ”
in my terminal i saw this problem
” You must specify both the volume and install application path ”
and i can’t fix my problem.what i do ???
« iMac with 27″ Retina 5k Display OS X Yosemite Installation Stuck
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Mohebbi says:October 12, 2015 at 11:33 am
sudo /Applications/Install\ OS\ X\Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled\ 2 –applicationpath /Applications/Install\ OS\ X\ Yosemite.app –nointeraction
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Peter says:October 24, 2015 at 10:07 am
Your article has a mistake. Do not rename the newly-formatted USB drive to Untitled 1. Theterminal command will tell you it’s not a valid mount point. Renaming the drive to Untitledfixes the problem and allows the process to proceed. Just sayin’
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Pamu Re says:October 24, 2015 at 11:13 am
No the article is correct, but you have to use the exact command as stated, if youdon’t escape “Untitled\ 1” it will tell you it’s not a valid mount point. You’reexperiencing a syntax error which is common if you are less familiar with thecommand line.
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YoyoPhilippines says:October 25, 2015 at 12:20 am
Hey guys! The command is also applicable to OSX EL Capitan, just follow all the stepsgiven then just use or copy this command line for it to work.
sudo /Applications/Install\ OS\ X\ EL\ Capitan.app/Contents/Resources/createinstallmedia–volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ EL\ Capitan.app –nointeraction
Thanks!!!
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