So I just downloaded the software update and everything went fine. Restarted the computer as directed and upon boot up it said that it couldn't install the selected files (or something to that effect) and it froze. I left it for a while to see if it would allow me to log in but alas, it never did. So I powered the Mac down. Upon restarting after a few minutes I got a Kernel Panic and I cannot boot up. I cannot go into safe mode. I have called Genius Bar and have an appt. for tomorrow but is there anything that I can do now?