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Diskmaker will then ask you to select the drive you want to use as a Yosemite bootable drive. If it doesn’t detect the installer, click on “Use Another Copy” to navigate to the installer you want to use. If this is the right installer, click on “Use this copy.” Diskmaker should automatically search your system for the OS X 10.10 Installer and should present the file with its location to you. You’ll be presented with options to make installers for either OS X 10.8, 10.9 or 10.10. Once you have Diskmaker downloaded, connect your USB to your Mac and open up DiskMaker X.Ģ. DiskMaker X for your Mac – you can download it from hereġ.The OS X Yosemite installer – this should be ideally placed inside your Applications folder.An 8GB or larger USB drive or external hard drive (this can be a partition on a larger drive as well).We’ve described both methods below.īefore you get started, make sure you have the following stuff with you: You can either use a simple graphical interface, or you can use OS X’s built-in Terminal utility. Now there are two different methods to create a bootable USB drive for Yosemite. So, if you plan to use the same installer file on different Macs in the future, or as in this case, you plan on creating a bootable drive, be sure to copy the installer to another location, such as an external drive, before you install Yosemite. And if you leave it there, the installer will delete itself after Yosemite finishes installing on your Mac. Similar to previous OS X versions, when you download Yosemite from the Mac App Store, it’ll automatically be downloaded to your Applications folder. Keep the Installer From Being Deleted Automatically