Apple – Support – Downloads – iMac Software Update 1.0
About iMac Software Update 1.0
This update provides important bug fixes and is recommended for 20-inch and 24-inch iMac models with 2.0, 2.4, or 2.8GHz processors.
Ummmm…. OK that’s nebulous and user friendly, but what are they really updating?
/System/Library/Extensions/ATINDRV.kext/Contents/PlugIns/ATY_Hypoprion.kext
/System/Library/Extensions/ATINDRV.kext/Contents/PlugIns/ATY_Iago.kext
/System/Library/Extensions/ATIRadeonX2000.kext
/System/Library/Extensions/ATIRadeonX2000GA.plugin
/System/Library/Extensions/ATIRadeonX2000GLDriver.bundle
/System/Library/Extensions/ATIRadeonX2000VADriver.bundle
Some more graphics drivers updates, just like the Mac Book Pro Software Update.
/usr/libexec/oah/translate
/usr/libexec/oah/Shims/GLEngine.bundle
And to expound more on that, these two items are the Rosetta PPC-to-Intel binary translator and the OpenGL bundle that is called by PPC games needing OpenGL routines in Rosetta.
So… I guess that means that the copy of Marble Blast Gold that I’ve hung on too since my first iMac will be even more awesome on a new 24″ iMac ;) It’s nice to know, though, that they are working hard to maintain support for PPC graphics apps.