The boot ROM or SMC versions of systems after the update is applied will be MBP81.0047.27 for the MacBook Pro, IM121.0047.1F for the iMac, MBA41.0077.0F for the MacBook Air, and MM51.0077.10 for the Mac Mini. MacBook Pro EFI Firmware Update 2.7 (4.24MB) MacBook Air EFI Firmware Update 2.4 (4.06MB) Mac Mini EFI Firmware Update 1.6 (4.08MB) The updates should be available via Software Update for iMac, Mac Mini, MacBook Pro, and MacBook Air systems released in early to mid-2011, but you can also download them from the following locations on the Apple Support Web site: The updates also fix a problem with the selection of the boot drive when a USB drive is plugged into the system. ![]() The updates, which require OS X 10.7.3 or later to install, address problems with NetBoot features, and fix problems with HDCP authentication after rebooting (which may prevent HD content from being displayed on certain monitors). Apple has released new firmware updates for a number of its early- and mid-2011 Mac systems.
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