In the latest beta, the game still has issues with fullscreen mode on Mac. Moving the cursor to the top or bottom of the screen still activates the menu bar or the dock, and moving it into a corner still activates hot corners, all of which causes problems when trying to play the game, partucularly when trying to scroll around the map. I know it is possible to disable these things, so someone should look into it. For the moment, however, the game is unplayable in fullscreen mode.
Framerates are still an issue, with my FPS counter rarely exceeding 12 FPS. For the record, I am on a relatively old Macbook Pro (2008, 2.5 GHz C2D, NVIDIA 8600M GT 512 MB) but no one has confirmed for me yet if my machine is below spec for the game, or if the Mac version is still that unoptimized. Some feedback on the issue would be appreciated.