So, there it is an Apple Mac configured to auto login is now showing a Login screen and it doesn’t seem to like any of the usernames and passwords that we could think of. In other words we’re locked out. I haven’t done an awful lot of Mac support, but I do know that it sits on top of a BSD core and because of this I knew we’d have some options. So, of course, the first thing I did was a quick search to try and get started… this post has a lot of helpful info about what to do if you’ve lost your administrator password (setting it up so you don’t have to enter a password for administrative tasks.) But most importantly it gave instructions for getting into single user mode.