A few times now, Starcraft 2 has frozen up on my wife's Macbook Pro, but the mouse pointer still moves and the sound keeps playing. I can also SSH in from a different machine. The keyboard shortcut for force-quit doesn't work though, and nothing in-game is clickable. Command-tab won't switch windows either.
If this were a straight-up Linux box, I'd find the application process and kill it from an SSH login. If that failed, I might take out the X server. Can I do anything like this in OSX? Is there something on the "problem" machine I can do locally instead?