Stuck synchronizing settings

Hey guys,
So I am playing Cod AW on my mac, but through windows 8 using bootcamp. For some reason I can only play on a very small portion of the maps. When I get in a game, it takes for ever loading, and then gets stuck at synchronizing settings. I am not sure what that is about and would really appreciate any help you guys can offer. I have a hard time finding games as is.. because of no dedicated servers, and now can barely get in the game when I do find a lobby.

Please help.
Thanks

Try to set to off the shader preload in graphic settings
Bye