I suffer from not being able to see the EA logo at the beginning? That's the only problem. Nothing else is wrong, there is the standard spawn lag but that's normal. I also tried to die ASAP for the video, I got lucky that some guy shot me

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The videos in the beginning are also a known issue. You can download a bink player to view them but I just deleted them since after playing for so long they're rather annoying now. You'll need to show contents of the Battlefield 2142.app then open "Contents\Resouces" then do show contents again on the Battlefield 2142.app there then go "Contents\Resources\transgaming\c_drive\" from there I think you can find your way around, it's pretty basic. You'll need to go into the "mods\bf2142\movies" then delete the files.
Now rather than show probably the only map that isn't totally affected, try showing more maps.
Trust me man, I know there's issues with this game and the new iMacs. I can't say much about it yet but there is.
Here's my YouTube showing the 'OTHER' maps since you only showed one. I even included the Camp map that does work, or at least works most of the time.
Again I never said it 100% did NOT work. When you see the video (it's being played using 1.0 drivers and the game still crashes) you'll see yes I can play, but who wants to play with graphics like this.
I start out with medium settings, then move up to high settings, no AA or anything since that adds mondo lag. But you can see maps like Sidi, Suez are botched to high heaven, Minsk as well, Camp works ok most of the time. Cerbere is one that works sometimes, but also suffers depending on your graphics settings.
I even did Minsk at high settings and it still suffered. These issues are known and according to official Apple a driver fix is on the way. I can't go beyond that.
UGGGGG still uploading, I'll post the link in a bit
Ok here's the video:
http://www.youtube.com/watch?v=9r7iTkHkzUg
Quality stinks due to poor lighting in my office and I had the brightness turned down on the iMac.