GFX Card: AMD Radeon 6770M (works great)
GFX Card: Nvidia 640M (works but is slower)
Run the crosstie and install the Gamersgate or GOG.com version into crossover. Don't install .Net 3.5, this is not nessecerry. After installation, you have to run the game manually doing --> programs --> run command --> select the bottle where the game is installed --> browse to GSGameExe_DX9.exe and run it. After running it once and succesfully exited the game it should normally a shortcut to the game. Use that shortcut next time to launch the game.
I noticed a difference in performance in GFX cards. On Nvidia the game runs (doesnt matter what kind of Nvidia Card) slower then on AMD Radeon, where it runs great! It looks like a GFX driver issue from Nvidia, so lets hope they fix it in later OSX updates. Latest test is on Mavericks 10.9.1
Enjoy!
Paul The Tall