updated 10:15 pm EDT, Mon June 27, 2011
Includes stability and performance fixes
Apple today released a Thunderbolt Firmware Update, the first one since the technology was introduced, through its Support Downloads page and Software Update for all eligible Macs, including the latest models of MacBook Pros and iMacs. The high-speed I/O port, which offers two-channel, bi-directional 10Gbps networking for data, audio, video and power, is being rolled out across the Mac lineup, including a rumored forthcoming refresh of the MacBook Air.
The update is said by Apple to provide "Thunderbolt performance and stability fixes," and cautions users that because this is a firmware update, "when your computer restarts, a gray screen will appear with a status bar to indicate the progress of the update" and that users must not "disturb or or shut off the power on [the] computer during this update."
The software update is small, at 486KB, and recommended for all existing Mac models with a Thunderbolt port. Future Mac models that will include Thunderbolt will have the update pre-installed at the factory.