To set the scene for this problem... The household bought a 2011 Mac Mini in early June. It was intended to be used by my father so I set it up ready for him, and registered it with his Apple ID. A little while later my father gets a free brand new laptop so the Mac Mini is suddenly mine and I ditch my old laptop before it's residual value drops off a cliff. I have a iPad 2 so I hardly miss having a portable computer. Now I set up the Mini for my Apple ID and things start to become slightly more complicated. I delete my father's account, by renaming it with my name. But things aren't so simple. His Apple ID still has any App Store purchases made up till then and you can't dissociate all the purchases made on this computer. I can start to use my Apple ID for App Store of course, but the old purchases are still there in another name. I decide to leave the App Store in my fathers name to avoid more confusion, but it isn't right. Say I want to upgrade to Mountain Lion. Things get really tricky then.. My question - to which I cannot find a clear answer - is as follows: How exactly do I make this Mac Mini to be completely in my name so to speak? I was thinking about doing a system restore and starting from fresh, but to be honest the system restore process seems strangely uneasy to fathom. Can I do a complete, no nonsense system restore to factory settings within the confines of the built-in system restore and then start again with my account? Can I get away without all that hassle though (which would be preferable)? I really would appreciate your help on this. I'm slightly disappointed Apple have made this thing so complicated. PS. Finder still says this is my father's Mac Mini. grrrrrr..