Hi guys, I am selling my mac today and need to know how to clear everything of it so none of my personal stuff is left on it. How do I delete my itunes? Is it called de-authorizing it? My contacts, iPhotos, etc. My saved forum logins? On my PC I know you just delete the cookies. Don't want someone posting as me if it remembers me. I want to leave Microsoft Office on it for the buyer. All the software is ok to leave. I need to make sure office stays as I don't have the discs to reinstall it. Thanks!