Apple released a series of EFI firmware updates for their Mac Mini, iMac, MacBook Pro and MacBook Air systems.
The updates are:
• iMac EFI Update 1.7 (3.69 MB)
This update enables Lion Recovery from an Internet connection and includes fixes that resolve issues with Apple Thunderbolt Display compatibility and Thunderbolt Target Disk Mode performance on iMac (early 2011) models.
• Mac mini EFI Firmware Update 1.4 (4.01 MB)
This update fixes several issues to improve the stability of Mac mini (mid 2011) computers and is recommended for all users.
• Macbook Pro EFI Firmware Update 2.3 (4.17 MB)
This update fixes several issues to improve the stability of MacBook Pro (early 2011) computers and is recommended for all users.
• MacBook Air EFI Firmware Update 2.2 (4 MB)
This update fixes several issues to improve the stability of MacBook Air (mid 2011) computers and is recommended for all users.
To get the updates, access the ‘software update' menu within OSX.
Got mine last night, dont notice any difference, but I rarely do anyway with these updates.