Thunderbolt Firmware Update 1.0 offers ‘fixes’
There are few to none Thunderbolt devices available, but Apple’s already issued a patch covering unnamed performance and stability issues. Thereupon, if you’ve got a 2011 MacBook Pro or iMac, currently the only Macs that ship with the next-gen I/O port built-in, then you’ll want to download and install this update.
Thunderbolt Update 1.0 (486K) provides “performance and stability fixes.” Apple isn’t saying what that means and, as there are so few devices out in the wild, users aren’t exactly complaining en masse.
Nevertheless, in addition to requiring OS X 10.6.8, you’ll need a Thunderbolt-equipped Mac, which is limited to 2011 MacBook Pro and iMac models.