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Name the partition you’ll be creating Snow Leopard or OS X Install so you can keep track of your installation device. Select the Erase tab on the right and then set Format to Mac OS Extended (Journaled).Open Disk Utility and select the Flash Drive.If the USB drive is not bootable you will NOT be able to install from it. This includes updating the options for the partition so that it is set to a GUID partition. NOTE: Depending on your flash drive, you may need to follow steps 5 – 7 on installing onto a USB drive to make sure the drive is bootable before you get start. 8GB USB drives are now incredible cheap – here is one for under $5.Īfter you’ve gotten the correct USB device, connect it to your Mac and prepare it with the Snow Leopard installation files by following these steps: The installation files are 6.2gb on the Snow Leopard DVD, so you’ll probably need a USB drive that has at least 8gb available. Like many of our other Mac Help articles, the steps listed below worked particularly for Snow Leopard but should also work for installing OS X from USB on Leopard. To do this, you’ll need to prepare your USB drive with the installation files.

This is especially beneficial to Macbook Air users looking to install the OS without a DVD drive.

Like other versions of OS X, Snow Leopard can be installed from a USB drive. With the operating system available to customers, individuals are ready for their upgrades. It was one of the most well received versions of OS X before Apple transitioned to calling their primary Mac operating system MacOS.Īt version 10.6, Snow Leopard, focused more on improving speed and performance than adding new features to OS X. Alternatively, you can also read these instructions on how to install OS X Lion from a USB Flash Drive.Īpple officially released Snow Leopard in 2009. The steps below will guide you through how to Install OS X Snow Leopard from a USB Flash Drive.