Jul 20 2011
OS X Lion was released today via the Official Mac App Store. Apple has limited the ways to get Lion on your Mac to only the Mac App Store. There is no Official method as of now from Apple that lets you perform a Clean Install of Lion on your Mac.
But that doesn’t mean you can’t perform a clean install of Lion.
1. Mac OS X Snow Leopard with Mac App Store installed.
2. A USB Drive with minimum 8Gb capacity.
Alternate Requirement: 4.7Gb DVD (Procedure of getting the Lion setup onto a Blank DVD is same as below, simply skip the 3rd Step)
Follow the steps below to Install OS X Lion from a USB Pen Drive:
1. Download Lion from the Mac App Store. You will get the setup in your Applications folder. Go to your Applications folder, Right Click on “Install Mac OS X Lion” and select Show Package Contents.