Hello, I have a iMac (bought new in 2009) running Leopard. I live in a home wtih two roommates and I think one of them has been viewing inappropriate material on my desktop while I'm at work. Is there any way for me to view the history other than through Safari. ie, IP adress history?? Also, how can I clean my computer/hard drive thoroughly as to prevent incrimination? I have since changed my password to prevent access from anyone other than myself, but I do not want anything I'm not aware of on my hard drive! Thanks for your help.