Hi all, I just bought a new mac book (never used a mac before) on a neighbors reccommendation. It seems like an awesome machine. My neighbor has offered to install everything on it for me, (office software, games, photo stuff, etc etc.) Sounds like a great idea to me but it involves giving my neighbor my machine for a night or two and I'm concerned about my privacy if I go ahead and give it to him. If I delete my history is it gone forever? Or is there a way for the "mac expert" to recover this? If so is there a way I can delete my history completely before giving it to him. Thank you so much for your advise.