I tried to install the Public Beta 3, everything was normal, the computer restarted and started the install (black screen with white apple logo and progress bar) The computer computer froze with 8 minutes left in the install process, the progress bar stopped and I couldn't move the mouse cursor. I left it overnight just to see if it would finish, and no luck. I turned the computer off and back on, it restarted twice, and everything seems to be fine. I'm still running Beta 2, but everything seems fine. Would a failed OS X update cause any issues? I don't trust that the OS if fine, even though all seems ok.