Apple released iMac EFI Update 1.7 for early 2011 iMac models late on Wednesday. The update added Internet Lion Recovery support, and adressed Thunderbolt-related issues, too.
In addition to Lion Recovery support, the firmware update fixed issues with Thunderbolt display compatibility, and improved Thunderbolt Target Disk Mode performance.
Apple’s Thunderbolt-enabled iMac
Internet Recovery was first introduced with the launch of the Thunderbolt-equipped Mac mini and MacBook Air. The feature lets users restore or repair a Lion installation over an Internet connection when the computer’s hard drive has failed, or a new drive has been installed, and a bootable installer ins’t available.
The update requires an early 2011 iMac with Thunderbolt port, and OS X 10.6.8 or 10.7.x.
iMac EFI Update 1.7 is free and available via the Software Update application, or as a downloadable installer at the Apple Support Web site.