has anyone updated mac from 10.4.11 to the new box set? i'm wondering if it automatically transfers what's on here or if it needs some tweaking. don't want to lose my data, even though the good stuff is on a removable HD. i love my bday present, a 3g ipad, but i can't use itunes until i sync it and apple makes you have 10.5; same with iphone 4.