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27-inch iMac SMC Firmware Update 1.0

This update fixes Target Display Mode compatibility issues on 27-inch iMac computers.

For more information about SMC firmware updates, please see this article: http://support.apple.com/kb/HT4117

For additional information, please visit: OS X Mountain Lion: Firmware updates may keep reappearing in the Mac App Store

File Size: 388 KB

System Requirements