So I am getting an MBA with Lion, and I am planning to update to ML via up-to-date program. The question is, will I need to perform a clean install of ML, or it is not necessary for a new machine? I just don't quite get the upgrade process in OS X, although in Win it always formats the system drive when installing.
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Do I need a clean install?
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Stop thinking in the old "Windows" way.
Do the upgrade as per normal - no clean install needed.
It won't wipe anything - it just updates all Lion files.