[Satcomer]

Originally Posted by bertnspike

I'm sorry, but I don't understand you at all. I bought a used mac laptop. The person I bought it from doesn't remember the password, so I can't install any new software or make myself the administrator. What can I do?

Ask yourself if it is a PPC or Intel Mac? Plus whenever asking for help please list the Mac and possible the version of OS x you are using.

Now do you know how to boot into Single-User mode? For the instructions to boot into that mode and once that comes up type the instructions provided by sheraz4u. He expanded my original post for 10.4.x for Tiger users (Tiger is 10.4.x and Leopard is 10.5.x).

Lastly if you just bought that from a user then he/she should have reformatted or provided you with a password. Plus you should NEVER buy a used computer without the original install disk provided with it. If you think about it the seller might leave all their personal stuff on the Mac/computer (that is advice for any kind of computer).