Create a bootable Mac OS X 10.7 Lion Flash Drive

Apple has announced that with the release of Mac OS X 10.7 Lion, the operating system will be available only via download from the Mac App Store. Past versions of the Mac OS X operating system have always been available for purchase on a bootable DVD and with some systems like the MacBook Air, they’ve been included on a bootable USB drive.

To create your own bootable USB device using your own flash drive (note that the device must be at least 4GB or larger), follow these instructions.

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