Windows 8 Thunders Past Mac OS X on Steam

I'm not sure if "Thunders" is the correct term here. It has roughly 44% more usage, which could be significant if Mac OS X didn't have less than 4% total usage.

I imagine that when Valve releases Steam for Linux, there will be headlines like "Linux rapidly encroaching on Mac OS X's usage share on Steam" when it hits like 1-2% total usage.

Of course Windows 8 is going to overtake Mac OS X, there are simply more gamers on Windows, and gamers tend to use the latest software, regardless of how terrible it is.

People focus too much on percentages of installed users. Better to look at the total user count (and compare that to the engineering cost of supporting the platform). It doesn't matter if OS X has 3% or even 0.1% of users. If the number of addressable customers is high enough, then it can be worth it to support that platform.