I recently bought a secondhand mac computer. It contains all the guys previous information. I need to know how to get rid of all of his info (i.e. all his computer accounts and passwords, itunes, documents, etc). I have tried using an external harddrive to switch my info into the new computer but I could not figure out how it worked. HELP! At this rate I would rather just keep my dell (only because I can't figure out how to use the mac). I need help converting over...any suggestions?