So I need to start my MBP up in OS X but i currently have windows selected to start up everytime through bootcamp. Problem is I don't have a serial key and I'm stuck at the authorization prompt. At this point I don't even care to use windows anymore I just want to get back to my Mac. Which brings me to the subject of the post: I've read that you can choose which partition to use at startup from the Disc Utility and I've tried to access this by inserting my OS X install disc and holding down the "C" key during startup. All this does for me is add a few seconds to Windows boot up time. Also, I've tried holding the "Alt/Option" key at startup to get to the disk selection menu but all this does is bring up a grey screen with a Lock on it and a password field. The admin password I made when I installed OS X definitely doesn't work and no serial numbers I've typed in works either. As a last ditch effort I tried changing the firmware password through Single-User Mode, but holding down "CMD+S" during startup does nothing for me either. Could it be that no Mac startup commands work when Windows is trying to boot up? Can anyone help me? who is John Galt?