iMac EFI Firmware Update 1.4

Apple has seeded iMac EFI Firmware Update v1.4 via Software Update.

This update fixes intermittent system freeze issues for iMac computers with ATI Radeon HD 4850 graphics and fixes wake-from-sleep issues in Boot Camp.

To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/iMac EFI Firmware Update.app). The updater will launch automatically when the Installer closes.


After the firmware is successfully applied to your Mac, your Boot ROM Version will be:

IM91.008D.B08

You can launch Software Update from the Apple Menu at the top left of your screen.

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