Need for Speed Shift Setting for MacMini late 2009 edition

I found that Need For Speed was running in a pretty lame performance on my Mac Mini.  Here's my current seting:

• Resolution : 149
• Resolution 1280x 768
• Refresh Rate 60hz
• Anti Aliasing 2 xAA
• Allow Windows Yes
• Allow FullScreen Yes
• Car Detail, Shadow Detail, Track Detail, Motion Blur, Text Resoliution all set to Medium

After try and try, I found out that if all the setting (Detail, motion blur ...) are set to low, the application will crash in the middle of the game.  Thus I need to set them all to "Medium".  At the end, I found that Resolution 112 (1176 x 664, 60Hz, 0xAA, Full Screen) yields the best result.