iMac EFI Firmware Update 1.4

System Requirements:

  • Mac OS X 10.5.6 or later

File Size: 1.7MB

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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

For detailed information on this update, please visit this website.

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