Hi, I'm using a brand new iMac (10.8.2) with Avid Media Composer 6.5. I've plugged a Blackmagic Intensity Extreme (Desktop Video 9.6.4 installed) for monitoring. But there isn't any signal. It seems that the Mac doesn't recognize the Blackmagic (About this Mac > Thunderbolt : nothing connected). Anybody knows how to fix it ? Thanks a lot.
I've reinstalled the driver a second time BUT I realized that there was a contact problem with the Intensity. I have to push the Thunderbolt cable until the white light turns on... And than it works perfectly. So, I'll go back to the deller to fix it.