Tested the game on a 2011 iMac 27inch I5 quad running Crossover version 11. This is running the Steam version of the game. While the game seems to play OK, I had to rate it bronze for the following reasons:
No sound in the game. Tried changing volume in game settings, but can hear nothing.
The mouse cursor appears, but with the normal white cursor superimposed over the game's larger cursor. While visible and the cursor moves, the game does not respond to input from the cursor. The keyboard keys do work and the game responds to keyboard input appropriately.
Other than the mouse issue mentioned above, the graphics look fine and the game is actually playable with the keyboard if you don't mind not having sound or using the mouse.
Computer stats:
iMac 2.7 GHz Intel Core 5
12 GB Ram
OS X 10.7.3
On crossover version 11