I got an old iMac in a free room and I have no way of finding out the user password. Since it is user password protected how can I hack it so that I can reinstall the operating system? It's the imac OS10 OS. I tried to install an older version of the OS, 8.0 I think because I have a disc, but it won't let me do it if I'm not logged in as an admin. It does boot up on the CD but you have to reformat the drive to install it and I can't do that when I have no access. I hate to just throw this computer out and anyone else is going to have the same problem if I stick it back in the free room. Can anyone offer a suggestion as to how I can hack the password?