Upgrading and Reinstalling Mac OS X
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Top 12 Reasons to Upgrade to Lion
Is my Mac compatible with OS X 10.7 Lion?
Which software is compatible with Lion (OS 10.7)?
How do I upgrade to Lion (OS 10.7)?
How do I upgrade or reinstall Mac OS X? (Snow Leopard & Earlier)
I’m upgrading to a new Macintosh, how do I transfer my files over?
After a data transfer or clean installation, how do I get my files and applications working again?