So I bought a Mac Mini a few years back and I disabled the password at boot. However, when I'm installing some software it's asking me for a password now and I see it's not my Apple ID password so I assume its the Admin password. Of course I have no idea what this password could be now as its been years. I tried every password I could think of and nothing. So what do I do now? I can't do a pw reset from the Users & Groups pw reset option since I don't know what the old pw is.