Two firmware updates are hitting the 27 inch iMac today that fixes three issues on the Apple [AAPL] devices.
The first update is as follows…
27-inch iMac EFI FW Update 1.0, weighing in at 2.1 MB and requiring Mac OS X 10.6.3, is recommended for all quad-core 27-inch iMacs and addresses a pair of issues related to high processor usage and display backlighting.
– 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 27-inch iMacs are not the only current Mac models to have experienced problems with processor performance during audio-related tasks, as Apple’s Mac Pro line received a software update in mid-February to address its own issues with heat and performance while handling audio-related tasks.