I can’t play a multiplayer game, I clicked the online button and it asked me for my key which it said was valid, then I entered my username which was also valid. Then it just sat there unchanging. The game didn’t exactly lock up since I can just hit escape to go back to the main menu. If I close the game and restart it, I just end up at that stuck screen again.
I’m using a Macbook Pro with a 2.4 GHz Core 2 Duo and 8GB RAM.
I have provided a screenshot below.