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Apple releases Thunderbolt Software Update 1.2.1 firmware upgrade

On Tuesday, Apple released its Thunderbolt Software Update 1.2.1 firmware upgrade for its Thunderbolt-equipped Macs running Mac OS X 10.7 (“Lion”). The update, a 506 kilobyte download, adds support for the Apple Thunderbolt to Gigabit Ethernet Adapter.

In addition to the direct download, Thunderbolt Software Update 1.2.1 is available through Mac OS X’s built-in Software Update feature. The update requires a Thunderbolt-equipped Mac running Mac OS X 10.7.4 or later to install and run.

If you’ve tried the update and noticed any changes, please let us know in the comments.