Hi,
I just experienced the same problem, however got it to work. I just changed from an iMac 21' to an 27' and restored my old system via Time Machine. I thought the issue might had been related to the higher resolution of the 27', and it was.
I just went into windowed mode (cmd + f) and changed the resolution. And waited to see if it worked. It seems pretty random, and I have to do it every time, but it is no biggie. Also, if one resolution works one time, it will probably not the next time the game is opened. But just changing back and forth seems to get it to work.
