I bought six storage units at auction this week. One of them contained a Mac all-in-one. The machine is working and I wish to resell it. I got into utilities and reset the password. Good so far. I'm wondering what else I should do.



There is an option to reinstall the Mac OS X. Not sure if that will lead to any problems.
There was mention of a keychain password. But I think more importantly, I just need to get a clean OS on here to protect the previous owner's privacy.

So what can I expect if I try to reinstall the OS through utilities? I do not have a disk.