Now we know why it took forever, they were trying to dual-release for Mac (and gave up at the end).
Honestly though, I'd like to see more games released for Macs closer to to the PC launch. I used to use a MacBook Pro as my main rig for the longest time... but went back to PC 1-2 years ago.
I'm a developer, and thus realize coding on one isn't the same as coding on the other. Especially since DirectX won over OpenGL, but considering the Mac is popular now and all of their semi-recent Rigs are fairly hefty it would be nice. Even the iMacs from a couple of years ago should be able to handle 1024x768 (or the widescreen equivalent) with decent quality settings.
"Space. It seems to go on and on forever. But then you get to the end and a gorilla starts throwing barrels at you." -Fry, Futurama