I've noticed this problem recently, where when i quit the game, i get a black screen for about a minute with the in game mouse cursor. It feels like a crash but i get no error report afterwards, and if i had the game on full screen before quitting, i wouldn't be able to do anything with mac keyboard shortcuts to force quit.
At first, it was a non-issue, but after upgrading from mavericks to yosemite it got really bad. The black screen would stay indefinately and i'm forced to shut down my imac with the power button.
Is there a fix for this other than going into windowed mode before quitting in case this happens so i can force quit? Feels really stupid to have to do that.