Apple Releases Thunderbolt Firmware Update v1.1 [Mac Blog]

Apple has released an update to mid-2012 MacBook Pro models to fix an issue with some Thunderbolt cables. The 442KB update is available via Apple's support site and the Mac App Store.

About Thunderbolt Firmware Update v1.1 This update addresses an issue with MacBook Pro (mid 2012) and some Thunderbolt cables that may prevent bus-powered Thunderbolt devices from functioning properly.