Apple EFI firmware updates improve Lion Internet Recovery and Thunderbolt
Apple has released a few updates for the EFI firmware in various Mac models from early 2011, which include new features and address a couple of prominent problems on the new devices. Firstly, the update enables Lion Internet Recovery for some systems that have not had it enabled (such as the early 2011 iMac), while improving its reliability in systems that already had it enabled.
Additionally, the update addresses a number of problems with Thunderbolt, including the performance of Target Disk Mode and compatibility issues with Apple's Thunderbolt Display.
The updates require OS X 10.6.8 or later, … Read more