Those hooking up the latest MacBook Pros to an HDTV using an HDMI adapter can now do so a little more easily: Apple has updated its implementation of Mini DisplayPort to pass audio signals through to any device that supports them. Until now, the miniDP port only transmitted video, even though the DisplayPort spec supports optional alternate signal channels such as audio or USB.
Apple confirmed to Ars that the just-updated MacBook Pros will pass both video and audio signals to an HDTV or receiver when using an miniDP to HDMI adapter
Moving troops into position for the upcoming Battle of the Living Room.
This is probably to help with using macs for audio and video production, not to sell laptops that you’ll hook up to your TV. But it doesn’t hurt either — I imagine that this change is happening across the board with recent macs.