Ok, so a few weeks ago I bought a game online called "Team Fortress 2", and it have a Mac client. When i installed the game and started it up, a message said my graphics card is not supported but I could continue anyway. I started the game, everything was good until the loading screen, everything went all flashy and stuff. Is there something to fix this? I used to have ubuntu and even though i could not install my graphics card on ubuntu, it was all good just really laggy in game of course.