– I would recommend creating a separate partition for your OS X Lion installation as well.Hold Option/Alt after your see the Apple logo appear and boot with the thumbdrive in your Mac.Ĭhoose the USB Drive to install OS X Lion from your USB Thumbdrive! Once its finished, you now have a bootable OS X Lion install thumbdrive (basically just like what the Macbook Air ships with).ĥ. I recommend erasing the destination, so be sure to backup any data on the thumbdrive prior to this step! This will take a few minutes to do. (ie THUMBDRIVE in the screenshot) and then click Restore Once you have it chosen, click and drag your USB Thumbdrive from the left pane to the Destination box. ![]() Click on the Browse button and locate the. On the right pane, go to the Restore tab.ģ. This is very handy for us Macbook Air users that do not have an external optical drive.ġ. ![]() We can then boot the USB Drive on our Mac to install OS X Lion from it. dmg installer file for OS X Lion onto a usb thumbdrive. – USB Thumbdrive or Memorycard Reader w/memory card (4GB mininum, data will be destroyed). ![]()
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