Along with an iMac firmware update, Apple released MacBook PRo EFI Firmware Update 2.3 and MacBook Air EFI Firmware Update 2.2 late on Wednesday. The updates, according to Apple’s release notes, fix several issues and improve overall stability.
The updates also include previous firmware patches that improve Thunderbolt compatibility, and in the case of the MacBook Pro update, add Lion Internet Recovery support.
MacBook Pro EFI Firmware Update 2.3 requires and early 2011 MacBook Pro with Thunderbolt port, and OS X 10.6.8 or 10.7.x.
MacBook Air EFI Firmware Update 2.2 requires the MacBook Air with Thunderbolt port, and OS X 10.7 or higher.
Both updates are free and available via the Software Update application or as downloadable installers at Apple’s Support Web site.