iMac (Intel-based) EFI Firmware Update 1.1 (#2): Problems applying; Built-in iSight not recognized; more

Problems applying Like recent EFI revisions issued for other Macs, the iMac EFI Firmware Update 1.1 is not taking properly on some systems.

If you are experiencing problems after attempting the installation, make sure you follow these guidelines before launching the firmware updater application which invokes the required restart:

• Turn off AirPort
• Disconnect any external devices (USB/Firewire)
• Quit all applications (prior to launching update application)

Built-in iSight not recognized Some users have reported loss of their built-in iSights after applying the iMac EFI Firmware Update 1.1. In some cases, this issue can be resolved by resetting the SMC (system management controller) using this process:

1. From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
2. Unplug all cables from the computer, including the power cord and any display cables.
3. Wait at least 15 seconds.
4. Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
5. Press the power button on the back to start up your computer.

Resetting PRAM can solve a variety of issues As mentioned in our coverage of recent EFI Firmware updates issued for other Macs, a number of potentially serious issues apparent after applying this EFI Firmware Update can be resolved by simply resetting PRAM/NVRAM via the following process:

Shut down your Mac, then start it back up while immediately holding the following keys: Command, Option, P and R. Hold the keys down until the computer restarts and you hear the startup sound for the third time.

This workaround is a good first course of action before exploring more complex fixes. It should also be attempted if your system cannot properly startup after applying the update.

• iMac (Intel-based) EFI Firmware Update 1.1 released

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