Apple on Monday released an update for iMac computers equipped with ATI’s Radeon HD 2600 Pro or Radeon HD 2400 XT graphics card installed, running Mac OS X v10.5.2 or later. The update is available for download from Apple’s Web site.
The update — version 1.01 — makes a change to the graphics card firmware on these systems that improves system stability, according to Apple. Once it’s done, the Mac’s Boot ROM or SMC version information (as listed in System Profiler) will read 113-B2250L-259.
The Radeon HD 2600 Pro and Radeon HD 2400 XT have been available in the iMac since August, 2007. They remain standard issue on the system today, though Monday’s introduction of a refreshed iMac model now offers Nvidia GeForce 8800GS graphics as a configure-to-order option; Apple claims the Nvidia graphics are up to 2.2x faster than the ATI graphics are in Quake 4 benchmarks.