iMac (Late 2013) EFI Update 2.1 Available

Mac Technical Support
This update is recommended for iMac (late 2013) models. 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.


System Requirements: OS X Mountain Lion v10.8.4 (12E4022) or later


You can download the update from here: http://support.apple.com/kb/DL1684
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