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It will then ask you where you want to copy the files-click "An 8GB USB thumb drive" if you have a single drive to use or "Another kind of disk" to use a partition on a larger drive or some other kind of external drive. If it doesn't detect the installer (or if you click "Use another copy"), you can navigate to the specific installer you want to use. Select OS X 10.10 in Diskmaker X, and the app should automatically find the copy you've downloaded to your Applications folder. It's still possible to create a disk manually using a Terminal command (which we'll go into momentarily), but Diskmaker X presents an easy GUI-based way to do it that is less intimidating to most people.
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An administrator account on the Mac you're using to create the disk.ĭiskmaker X has actually been around since the days of OS X 10.7 (it was previously known as Lion Diskmaker), but it's more important now because Apple has made alterations to the installer that prevent easy USB drive creation using the built-in Disk Utility app.This app is free to download, but the creator accepts donations if you want to support his efforts.
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The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.
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Or maybe you need a recovery disk for older Macs that don't support the Internet Recovery feature. For instance, if you find yourself doing multiple installs, a USB drive may be faster than multiple downloads (especially if you use a USB 3.0 drive). Things have proceeded remarkably smoothly since version 10.7 switched to download-only installers, but there are still good reasons to want an old, reliable USB stick. Further Reading OS X 10.10 Yosemite: The Ars Technica ReviewIt was 2009 when Apple last released a new operating system on physical media.