I tried installing Mavericks over Snow Leopard. Went fine untill the machine rebooted. Now I'm stuck. It doesn't get through Post. To add to the problem is that the screen is cracked and I can't hook up to an external monitor so I'm left in a virtual ****. I've tried all the commands back out of this mess. The only one that seems to get me anywhere is logging in Verbose Mode. Unfortunately I can only see a small portion of the screen in the left corner and can't get any further. It appears the only way to get beyond this is to get into a terminal screen. If I could, I wouldn't even know where to start cause I don't do any work in it. Any ideas how to get out of this situation and get my machine back?