If you already have the OS X Yosemite installer application in the /Applications/ folder on the Mac, you can skip directly to step 3:ĭownload OS X Yosemite from the Mac App Store, it’s free (direct link) – DO NOT INSTALL IT YET The next step will actually make the installer drive from the previously formatted USB disk. Step 2: Making the OS X Yosemite Installer Drive
Now that the drive is ready, you can move on to making the actual installer. Next go to the “Partition” tab and under ‘Partition Layout’ click on the pulldown menu, changing it from “Current” to “1 Partition”Ĭhange the name to “Untitled” from ‘Untitled 1? then click on the “Options” buttonĬhoose “GUID Partition Table” as the partition scheme and choose “OK”Ĭlick “Apply” and confirm the creation of the partition If you don’t want to erase the drive, find one you don’t mind formatting instead.Ĭonnect the USB drive to the Mac and launch Disk Utility, then select the drive from the left side drive listĬlick on the “Erase” tab and format the drive as “Mac OS Extended (Journaled)”, then choose “Erase” and confirm This is going to format the drive so that it will be a bootable installer, without doing this the drive may not be bootable. Step 1: Format the USB Drive to be Bootable The convenience of a portable flash drive is undeniable so it’s preferred if you’re going to be updating multiple Macs.
#OS X YOSEMITE DMG TO USB HOW TO#
How to Create a Bootable OS X Yosemite Installer Disk in 2 Stepsįor the purposes of this walkthrough, we’re going to use a 16GB USB flash thumb drive, but you’re free to use whatever you want, and you could even use an external hard drive if you really wanted to. Basically, if the Mac is capable of running OS X Mavericks, it is capable of running OS X Yosemite too. Of course, we’re assuming the destination Mac(s) that are going to get Yosemite are compatible. The “Install OS X Yosemite.app” launcher in the /Applications/ directory of the Mac (downloaded from the App Store, but not installed) Before you begging, make sure you have the following basic requirements met:Ī USB Flash Drive that is 16GB or larger which you don’t mind formatting 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.Ĭreating a Yosemite installation drive that is bootable is quite simple, but it’s a multiple step process. 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. Make an OS X Yosemite bootable install drive How to Make an OS X Yosemite Boot Installer USB Drive
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