I have a macbook pro 13'' 2.4. I didnt adjust the setting for gameplay and I was getting some glitchy boxes on the screen. The game play was smooth but there were glitchy spots and eventually it "crashed" on the second mission. Also..what is the game client? I am currently downloading the "mac game client" and its 6.99gb and taking quite a while.
"what is the game client?" I don't know what you mean, and yes it will take a while, try not to have any other programs running as this will slow it down and also have possible crashes. Also you might need to tone down the graphics.