iMac EFI Update 2.1
Updates the EFI firmware on your iMac computer
It will take several minutes for the update to complete. Do not disturb or shut off the power on your iMac during this update.
iMac EFI Update
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What's New in This Release:
- This update addresses an issue which may cause a black screen to appear when installing Windows 7 or Windows 8 using Boot Camp Assistant if both an external optical drive and USB thumb drive are connected to the system.
- This update also ensures that the system will boot by default into OS X after installation of Windows 8.