Borderlands 2 on iMac (Early 2009)

So, Aspyr is releasing Borderlands 2! Yay!

I used the Gameagent Mac Match to see if my iMac was compatible. The game says it needs a Geforce 8800. My iMac has the Geforce 9400M.

Gameagent says my iMac isn't compatible, but the game may still run with low quality settings.

Does anyone have any insight as to how good/bad it would run? (if it runs at all) A new iMac is in the future, but not for 6 months or so.

Blah blah blah get a pc blah blah blah. Due to my work, I need to use a Mac at home. And I'm not going to have another system just for games. (I'd get a console before I got a gaming pc) So, if Borderlands 2 would work with a Geforce 9400M, great. If not, I'll cry a little. And then wait until I get a new iMac and buy it then. (I hate waiting....)