Apple Releases 2nd Firmware Update for 27-inch iMac

Apple released 27-inch iMac EFI FW Update 1.0 Wednesday, the second firmware update for 27” iMacs today. The EFI FW firmware update addresses an issue with processor use and backlighting on the iMac.

Apple’s patch notes:

  • Resolves an issue that sometimes caused high processor utilization while playing audio through the headphone output mini-jack.
  • Resolves an issue that prevented the display backlight from turning on after powering on the iMac.

The update is a 2.1MB download through Software Update (if you have a 27” iMac). It requires Mac OS X 10.6.3. Follow the on-screen instructions for installing the update.