If you are using a larger drive, then only one volume will be erased. If you are using an 8 GB thumb drive, the whole disk will be erased. For this walkthrough, we used an 8 GB USB thumb drive. Choose the best option for the drive you wish to use. It will default to using the installer it found, but will also give you the option to use a different copy.ĥ.) The next window will ask if you are using an 8GB thumb drive or another kind of disk. It will default to Yosemite (10.10).Ĥ.) After choosing the OS you wish to use, you will be presented with a window notifying you that DiskMaker X found an installer. From there launch “DiskMaker X 4b4”ģ.) The first window will welcome you to DiskMaker X and ask you to choose which OS you want to make a bootable install drive for. Drag the Mountain Lion on a rock to the Applications folder that the arrow is pointing to.Ģ.) Open Finder and go to your Applications folder. Here is our brief walkthrough for making an install drive:ġ.) Open the DiskMaker X disk image (.dmg) file and you will get a window with the application and a shortcut to the Applications folder. For a walkthrough of creating a bootable OS X Mavericks USB install drive, click here. So don’t forget to backup your data first!įor more about OS X 10.10 and its new features, check out our convenient Yosemite Compatibility and Transition Guide.

It should be noted that DiskMaker X erases the volume or the drive you chose, according to the options you chose. All you need is an 8 GB (minimum) USB thumb drive, a USB, FireWire, or Thunderbolt drive or an SD-Card the OS X 10.10 Yosemite Installer from the App Store and the DiskMaker X application. Like the previous versions, DiskMaker X is free of charge (however, donations are accepted).

Luckily, DiskMaker X helps fill the void by allowing you to make a bootable OS X 10.10 Yosemite USB install drive, making a task such as installing on several different machines easier. So if you previously relied on DVD installs, you will be unable to do so with this version. And like the previous versions of OS X dating back to OS X 10.7, Yosemite is only available for install via download from the Mac App Store. Update 09/2015: For help creating a bootable USB install drive for OS X El Capitan, click here.Īpple released the latest and greatest Mac operating system last month in the form of OS X Yosemite. UPDATE 09/2017: Create a Bootable macOS High Sierra Install Drive with DiskMaker X 7

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