I want to give my MacBook Pro to my husband and want to get the old data off of it, but I'm not eager to go through a reinstall process from the original disks (was originally Leopard and have gone through Snow Leopard, Lion, and now Mountain Lion). Since this is staying in the family, I don't think I need to do a 7 pass erase or anything like that, but I'd like to turn it over fairly clean. On this thread from back in 2009, it was suggested just to create a new administrator account and delete the current one. http://forums.macrumors.com/showthread.php?t=635637 That seems easy enough, but is that all I need to do, now that we're in the era of iCloud, the Mac App Store, etc.? Will that remove the old data and free up hard drive space? I know I'll need to de-authorize iTunes and turn off my iCloud. There doesn't seem to be a way to de-authorize the Mac App Store (which gives me some concern as to how many copies of Mountain Lion I can use - searching on that gave conflicting information). Is there anything I'm missing?