I have installed Avid MC 6 on to my Mac Pro and then I updated the Intensity Pro driver (ver 9). I get the audio outputted to my monitor but no picture (and my monitor is stating unsupported signal - although it all works fine with FCP).
I responded to you directly in email as well. This is again for other peoples reference. Please verify that your project is set to a video format that the Intensity Pro can support. Of all the boards the Intensity supports fewer formats than some of the others.
So what format are you working in. We can try to recreate what you're doing in our labs.