I get 39fps ave @ 2560x1440 2xAA on ULTRA (highest) setting on my 2011 27" iMac 16Gb RAM and 6970M 1Gb GPU.
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I use the Logitech G27 - a quality pice of kit, and works great on OS X when you install the Logitech ForceFeedback kext.
Someone above mentioned that there are options, and yes, I think there should be. As I mentioned above, I often get screeching audio feedback through my speakers, and hear weird noises from just one or two players.
It is really frustrating that there are no proper instructions on mull-player in any of the F1 series games.
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Don't see why that should affect PC or Mac versions. They'll still be produced.
Don't do bootcamp, unless an absolute emergency! It's a 6970 1Gb I've got.