Apple updates firmware for iMacs with Radeon 4850 graphics

Over the weekend, Apple released iMac EFI Firmware Update 1.4, an update specific to newer iMacs that use ATI Radeon HD 4850 graphics chips.

The new update “fixes intermittent system freeze issues for iMac computers with ATI Radeon HD 4850 graphics and fixes wake-from-sleep issues in Boot Camp,” according to Apple.

System requirements call for Mac OS X 10.5.6 or later.

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