Ok here we go. I am running an iMac 800Mhz with 768MB of Ram and plenty of empty hard drive space. I have played TONS of games with little or no incident Deus Ex, All the Quakes, Unreal, Unreal Tournament, Wolfenstein, Medal of Honor, Halo included. I am now playing Call of Duty and have a problem in the Russian Mission, I get through the tank level called Tank Drive Country and it loads Tank Drive Town. I Click to Start the Mission and I get this error: CMod LoadBrushes: bad shaderNum: 65550. Ive changed my video settings and even reinstalled and nothing helps. Any help would be appreciated.