just bought a macbook 4 at a garage sale running os x . i am a new mac user and i cant login to the computer. ive tried the apple key + s when booting up to change passwords using the command line method. It doesnt do to the command line to do it. the next step i read was to use a boot disk or installation disk to access it. I dont have one and cant find the software online to download it. I also dont know what verson the os x is. at the password prompt it says os x temp 12.Please help a newbie with this issue