frsr's issue isn't the same as tato1188. I'm having the same issue as tato1188 in that after choosing to play the game, it loads, I can interact with the character on the initial screen (shoot weapons, jump around) but as Soon as I walk to the right and the screen shifts it crashes to the Desktop with a crash log. I'm getting it on my 27-inch iMac: (Mid 2011, 3.1 GHz Intel Core i5, 8GB RAM, AMD Radeon HD 6970M 1024 MB, OS X 10.7.5): Important part of the crash log: Thread 1 Crashed ↩:: Dispatch queue: com.apple.libdispatch-manager 0 libsystem_kernel.dylib 0x9997190a kevent + 10 1 libdispatch.dylib 0x9c7a5e04 _dispatch_mgr_invoke + 969 2 libdispatch.dylib 0x9c7a4853 _dispatch_mgr_thread + 53 Not 100% sure what it means but it seems to be the source of the crash. Hope this helps.