I have successfully installed the DeckLink HD Extreme 3D card on my Mac workstation, and it is working well with Media Composer 188.8.131.52. However, I do have a slight glitch where it takes the software (or possibly the hardware) about a second or two for the sound to start playing. This seems to happen most noticeably when switching from playing in realtime to jogging frame by frame. The way the monitor reacts, it acts as if it is getting a new signal.
Is there some kind of setting in either Media Composer or the Blackmagic drivers to overcome this? Is this a common issue? Switching the card setting "When not playing video, send" to "Last Frame Played" seemed to help some, though didn't fix it. This is a huge issue for me because it makes trim editing next to impossible to do.