Apple has released a new update today for all of their Thunderbolt-enabled Macs (all current models except the Mac Pro). The update is intended to provide stability fixes and improvements for the Thunderbolt interface, as well as Target Disk Mode.
The update weighs in at just 1.22MB, requires OS X 10.8.3 or later , and is available now through Software Update for supported Macs, as well as for direct download from Apple’s software update page.