I just acquired a macbook pro, with Snow leopard. I just went to share some files and must have accidentally made it so everyone had 777 permission (to read / write everything). Ooops! This messed everything up, so I went and I chmod 644'd everything in /System/Library/LaunchDaemons and I made it to the actual login screen. After logging in, I get a gray screen, no text, and at one time I had a terminal, but am not sure that is still there and will stay there if I restart. What happened and what can I do? I'm good with linux, but i've never had this problem with a mac. I even tried to bypass the login with the rm /var/db/.applesetupdone So as it stands now, I can see the apple, and the scrolling wheel when it starts up, and hangs. it says AirPort: RSN handshake complete on en1 in verbose mode. I'd imagine the equivilent for windows is when explorer.exe does not execute and you have to redo. But when I insert the cd, it beeps 3 times again and again and does not proceed to any sort of failsafe. Ideas? Thanks in advance!