At the WWDC keynote this morning, it was noted that Apple is introducing new Thunderbolt adapters, including one for Gigabit Ethernet – important for buyers of the MacBook Air and new Retina Display-equipped MacBook Pro, both of which have Thunderbolt, neither of which have on-board Ethernet.

So it’s no surprise that this afternoon Apple offered a software update for Thunderbolt-equipped Macs to support the new adapters, which go on sale for $29. The 1.2 release of the software is available for download on eligible Macs using the Software Update system preference.

(Hat tip: The Mac Observer)