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When trying to quit, do not be in full screen mode.

:apple: + M

This saves you from having to shut down the computer wrong and potentially damaging the hard drive.

Yup, I've learned to use this same method. Also, just so you know, it'll never lock up your computer completely even in full screen mode. Try bashing on the force quite key combo (Command-Option-Esc) until it finally force quits.
 
hey, finally more people with my problem of needed game ports being used and weird waiting for host crap. So, I am an avid dota fan and would just get booted for lagging so much even though it said "waiting for host!" Solution to this even though it may be annoying is to just ask the host if they are using vista. If they are then leave the custom game and join a different one. I have been doing this for about a week and even though it's a minor inconvenience, I have been "waiting for host" free for about one week now. The computer crashing at the main menu and making me force quit is a whole other story so if someone knows how to make it stop crashing then plz post. Thank you very much.
 
I get some very similar issues. I get the "port already in use" problem and also frequent crashes in DotA. Most of the time it's at the very beginning of the match, before you choose your character but it also occurs during regular gameplay. So annoying because i cannot access the force quit options even using command option esc. Also, not sure if this is a bug, but at the beginning, my computer pauses the match for about 5 seconds without me doing anything...it mentions that this is not a bug but it doesnt happen to anyone else i know.
 
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