Hey guys, i have a question. A week ago i bought a macbook from a friend of mine. He was getting a new macbook pro and wanted to get rid of his old one so he sold it to me. The computer is a white macbook. the polycarbonated one. He made a copy of everything on his computer to a external Hard drive. But now i want to basically erase everything that is on it. Is there a simple way i can do that just format it. I have no cds to put back anything. I just want it to be the way it came out of the box. Thank a lot i appreciate it 