Apple releases firmware updates for Mac mini, iMac, MacBook Pro, MacBook Air
05.02.12
After installing the iMac firmware update, affected iMacs can run Lion Recovery from an Internet connection, and the update also improves Apple Thunderbolt Display compatibility and Thunderbolt Target Disk Mode performance. If you’re installing the firmware updates on a laptop, ensure that you plug it in first. The update will appear in Software Update only after you install the necessary firmware update for your Mac. In addition to the firmware updates, Apple also released Thunderbolt Software Update 1. Each of the firmware updates is available though Software Update. Apple says that the update provides support for the Apple Thunderbolt Display and bug fixes for Thunderbolt device compatibility. (It’s also a good idea to plug in your Mac mini or iMac, since they work far better when drawing power.