Apple releases iMac EFI Firmware Update 1.2

Apple today released iMac EFI Firmware Update 1.2 which improves the performance and reliability of Intel Core 2 Duo processors and fixes issues with Boot Camp for iMac computers.

System Requirements:
• Mac OS X 10.4.10 or later
• iMac (Late 2006)

After the firmware is successfully applied to your computer, your BootROM Version will be one of the following:

You can confirm the version of the BootROM installed on your computer using System Profiler.

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

iMac EFI Firmware Update 1.2 is available via Software Update and also as a standalone installer.

More info and download link (3.9MB) here.

[Thanks to MacDailyNews Reader “GmanMac” for the heads up.]


  1. So what are these “issues” that have been addressed? I can’t seem to find any definitive source as to what the firmware update specifically fixes/improves.

    I personally have given up on boot camp 1.3 and 1.4 betas due to problems with my wireless Mighty Mouse and keyboard not connecting on boot (despite following the instructions to the letter) not that a CPU update is going to fix that anyway ” width=”19″ height=”19″ alt=”grin” style=”border:0;” />

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