I'm selling my MacBook Pro. But I have three questions. 1. Should I zero-out my data before selling it? 2. It came preinstalled with Lion. I want to sell it with Mountain Lion, but give an out of the box experience. How can I do this? 3. My iLife 11 applications from the Mac App Store are associated with my Apple iD somehow...Is there a way to unassociate them after I do a clean install? I don't want them messing with my Apple iD. Thanks.