I am restoring a 2008 iMac to basically factory settings and want to reinstall Yosemite as the OS. I've tried booting the iMac and reinstalling the OS (El Capitan) but it failed saying that it couldn't find the package (?). I have erased the hard drive as I wanted a clean slate and this method (wipe then reinstall) has worked fine for me in the past.
So my next option is to create a bootable USB pen which is where I'm having trouble. I have downloaded the Yosemite installer dmg. I have a MacBook Pro M1 and when I mount and then try to run the Yosemite installer, of course it crashes out with the error saying I can't install it on this computer. Without the installer running in the Applications folder, I can't follow any of the steps on the Apple Support site (createinstaller terminal code process) or via any tutorials on YouTube or whatever comes up on Google.
However, I found an article with information on how to download the Snow Leopard iso and further in the thread it talks about how to turn that into a bootable USB pen using Big Sur - -to-create-a-bootable-os-x-snow-leopard-usb-drive
I'm pretty sure you can't buy installer discs from Apple anymore (Lion was the last version they sold an installer for, and that was a USB key, not a DVD. But you can make your own in several different ways:
Create a USB installer with the createinstallmedia tool included in the downloadable installer. See @onik's answer, or Apple Support Article HT201372: "Create a bootable installer for OS X Mavericks or Yosemite". Note that it omits an important first step: make sure the USB disk is formatted with the GPT partition scheme, and the volume you're going to use for the installer is in Mac OS Extended (Journaled) format.
If you really want to make an installer DVD, there's a posting on the MacRumors forum by tywebb13 that gives a command-line procedure for making a disk image that you can burn to DVD. I haven't tested it, but I'll include it here in case that source goes away:
It seems that Apple doesn't supply OSX on a retail DVD anymore, since all modern Macs have a recovery partition, which contains the installer and is updateable. However, there are ways to create an installer USB drive, and here is Apple's own solution.
You can then use the createinstallmedia tool to convert the volume from step two into a bootable installer based off the installer app from step one. To learn how to use createinstallmedia, use the following command in Terminal:
For example, assuming you have a volume mounted at /Volumes/MyVolume and the OS X installer app is at /Applications/Install\ OS\ X\ Mavericks.app you could erase /Volumes/MyVolume and convert it into a bootable installer with this command:
You may need to adjust the path to the OS X installer app and/or your removable media device's name in the command. createinstallmedia is an advanced option for system administrators and as such, requires some knowledge of the command line in order to be used properly. It is only intended to be used with the version of the OS X Installer app it came with.
I recommend making one for Yosemite, on an external hard drive or USB thumb drive, for many of the same reasons I recommend making a bootable Mavericks installer drive: If you want to install Yosemite on multiple Macs, using a bootable installer drive can be more convenient than downloading or copying the entire installer to each computer. If you want to erase the drive on a Mac before installing Yosemite, or start over at any time, you can use a dedicated installer drive to boot that Mac, erase its drive, and then install the OS clean and restore whatever data you need from a backup. And if your Mac is experiencing problems, a bootable installer drive makes a handy emergency disk.
Now that OS X Yosemite is available, many users may wish to create a bootable installer drive from something like a USB flash thumb drive or another disk. This allows for several things, the ability to upgrade multiple Macs without having to re-download the installer, the ability to perform a clean install, and also the convenience of having a separate bootable reinstallation drive in the event you need it for serving a Mac.
The next step will actually make the installer drive from the previously formatted USB disk. If you already have the OS X Yosemite installer application in the /Applications/ folder on the Mac, you can skip directly to step 3:
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 update multiple Macs without having to download it from the App Store again. Be sure to always back up 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 X Yosemite!
Thank you, you saved my life. My USB was stuck in MBR partition scheme.How come the macOS installer does not format the USB drive by itself with the correct partition scheme? Or at least tell us that something is wrong?
I did everything right (with a 16 GB flashdrive) exited Terminal, but when i was booting it up from the disk select menu it said needs 3.7 GB more of space to install on this disk.Can anyone please help me? I am trying to boot up my iMac with it. Thanks
Hello guys. Im a newbie to mac and ive got a real problem on my hands. I have a 2009 white macbook im trying to upgrade to Yosemite. However, I cannot boot into the macbook because I mistakenly erased my startup disk. Now I just made a bootable usb disk from a windows tool called TransMac but my macbook doesnt show this bootable disc when I try to install from it. Any help please?
Has anyone operating with Mavericks attempted to make a Yosemite installer USB drive using the Yosemite installer download?Apple HT201372 indicates the createinstallmedia command is to work only with the version of the OS X Installer app it came with. Does this mean to create Yosemite media the system must be running Yosemite?
Wingle. Considering that users update to OS X Yosemite from OS X Mavericks, hmm I suspect you did not even read the article here, describing how to make a USB installer drive for OS X Yosemite, from OS X Mavericks or OS X Yosemite, as long as you have the Yosemite installer downloaded. This article answers your questions and shows you how to create the installer drive with a USB disk of your choice.
I would suggest reading the article and then following the steps precisely, if you can not do that, then you should not try to make a USB installer and you should probably not install OS X Yosemite either. Maybe wait for the OS X El Capitan installer and use that in September.
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 the world. You have an arduous task ahead to recover your files.
I am trying to install a fresh copy of OS X Yosemite on my MacBook Pro, 13-inch, Mid-2012 and the instructions given above are quite what I need. The only thing I have to ask is, does all my Data and Applications stay? Or do they get deleted since a fresh copy of OS X is being installed?
Thanks for the info.Is there a way to partition the USB so that the OS X installer only takes up the space it requires?I have a 16GB usb drive, but would like to put both the OS X installer and a Windows OS installer on that usb drive in two different bootable partition. Is that achievable?
Don has a good recommendation with System Restore. Reboot the Mac and hold down Command+R or Command+Option+R to start the system recovery process would be your best bet if your Yosemite install drive does not work.
I had a similar problem. My issue turned out to be that I had a slightly older version of the Yosemite installer. I had created it a while back, and it was version 1.65. As of today (12/26) the version is 1.67. Somehow the installer knows to check to see if you have the latest version. My suggestion to you is to download a fresh copy, and do it all over again. I was eventually able to get mine installed, and am using it to reply to you now. Happy Holidays.
I find it smarter to just install Yosemite with the installer to an external hdd or stick (dont know the required size of the stick) then boot up the recovery partition on the external device and install/update from that, no need to use terminal, and you will have an external OSX to boot for diagnostic use as well (very usefull to recover data from an unbootable internal drive, test software before installing or simply just have your own OS with you whithout having your to bring your Mac ).
Strange problem.I made the boot drive. It worked. However I messed up some transferring of files from my old user and want to start over with a clean install again. This time the boot drive does not work. I tried to make another and no dice. Nothing boots, just sits on a black screen.
Made the installer on USB stick, however contents of the drive only has the Install OS X Yosemite on it, none of the other elements these instructions show. (System, Library, Usr, etc). Did I do this incorrectly?
I am in mid way redownload OS X after erasing the HD. Now my friend told me to skip that and create bootable USB. Can I boot up my macbook air and create bootable USB then redownload OSX?Instead of redownload OSX and create bootable disk?
After I created a boot drive of OS X Yosemite, is it enough for a clean install of old hard drive/OS of new hard drive? or do i need to install the previous mavericks first then use the Yosemite boot drive?
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 I need to (or can I even) re-download the Yosemite Installer from the App Store? Or is it already on my system and ready to go? Just need to know if I have to do something else because I definitely want to do a clean install. Thank you so much, awesome tutorials/articles here, I will definitely keep coming back! 2b1af7f3a8