Wow.... ok ....
Apple hardware is doing just FINE at playing games for me, as long as they don't cripple them with bad Cider ports! (Granted, I'm using a Mac Pro ... but that's what you WANT to use, if you want a really good gaming experience out of your Mac, along with everything else.)
I can either boot into Windows via Boot Camp and run them just fine, or run them quite playable as native OS X programs (Call of Duty 4, etc.).
Steam coming to the Mac is the best thing that could happen to them, gaming-wise -- because it gives the small developers some real exposure for their work (games like Enigmo were written first for the Mac, but didn't really get too well known until they started porting it for other platforms). Plus, it makes everything more accessible. Even the "big name" titles aren't always easy to get ahold of for the Mac, because local stores don't bother to carry them on their shelves.
I find that 99% of the people bellyaching about the Mac having "too poor of video and too few options" to be usable as a gaming machine are just hung up on chasing the best performance, regardless of practicality. (EG. What good is being able to render a game at 240fps when the human eye can't even tell the difference between that and HALF as many frames or less? And what good is running a huge LCD at a really high resolution when it's been proven that for gaming, a 22" or smaller LCD is optimal anyway? Your eyes can't take in the whole scene at once, at a normal viewing distance from a monitor when the screen is larger than that.)
The only really legitimate reason a Mac hasn't been a "good gaming machine" so far is due to lack of interest in developing software titles for it. The ONLY way to ever turn that around is to support efforts like this one!
2 million during the day time hours is pretty normal on Steam.
Apple's limited hardware choices have made the platform useless for me when it comes to gaming. I don't see a reason to continue expending my money on a futile effort.
Also: 25,000