Thunderbolt 1.2.1 update adds Ethernet adapter support, reportedly squashes boot issues
Got your fancy new Retina MacBook Pro? Eying up one of those Thunderbolt to Ethernet adapters? Well, Apple’s just released a software update that adds support for the nifty peripheral. That’s the main purpose of this latest version — 1.2.1 — according to the company’s website. However, there are reports suggesting it also resolves a boot-related issue that was affecting certain users, caused by a previous update. If this was affecting you, or you’re running OS X 10.7.4, then make a dash for that source link.
SOURCE via Apple