Linux and OSX was an completely 64 Bit player, so using 64 Bit was right.
Think i must try it too with Mint.
Hm… But the Steam Client try to hook with the player. You can see it here:
SteamCGLFlushDrawable, gameoverlayrenderer.dylb, …
The Steam Client tries every time to hook with the Steam Overlay. Try to start the game manually here:
open ~/Library/Application\ Support/Steam/SteamApps/common
Or go to -> Preferences -> In game -> Disable Steam Overlay.
I think then it starts. If it was this issue, try to add the latest steam_api.dylib in the game.app/Contents/MacOS directory (where the binary is located)
Then re-enable the overlay in the client.