THINQ.co.uk is reporting that Apple has pushed out a significant OS X software update, designed to improve performance and visual quality in the Mac version of Valve's Steam client. Since Steam was released for the platform three months ago, many sources have lamented the performance of the games compared to their Windows counterparts. Some have even gone as far as to set up Windows partitions using Boot Camp to avoid the reduced frame rates in the Mac client.
That's all changed now, thanks to the Apple's graphics update and some Steam optimizations added by Valve. By tightening up some software inefficiencies pertaining to how the OS drives the graphics hardware, the games no longer have such a pronounced reduction in frame rate when running at higher resolutions or with cranked-up visual settings. One of the most hyped of these visual improvement is known as an "occlusion query," or as the guys at Valve put it: