defecta, on Jun 12 2010, 06:47 PM, said:
As I mentioned in my earlier posts in this thread, there is a software switch in the NVIDIA drivers that enables the SPDIF passthrough, that to my knowledge still has not been written or enabled in OS X yet.
Sure, you will need the HDMI adaptor to get the digital output from the card once its enabled but the problem everyone that has an SPDIF passthrough cable on their NVIDIA cards has is the current inability to allow the input from the SPDIF cable to passthrough the video card and out the DVI/HDMI port.
Being able to software enable this switch on our cards is the key. Im sounding like a broken record. I have said the same thing three times in three different ways in this post alone, not to mention the other posts that I have made. I don't think I'm being hard to understand.

It was broken in 10.6.2 but fixed in 10.6.3. I'm using that now and it works.
I was using a zotac 9400GT with DVI earlier. I had connected 2pin spdif from mobo to the 2pin connector on my zotac 9400GT. Then used a $5 DVI-I (24+5 pin -- thats the main key) to HDMI adapter.
In 10.6.2, this setup WILL NOT give me audio over the DVI-I/HDMI adapter. But it WAS giving me audio in windows XP. So I just used a spdif 2pin to RCA adapter and was feeding audio via the spdif digital coax cable to my pio elite and DVI-HDMI cable for the video.
Come 10.6.3 and I read on this (or somewhere else) that the audio over HDMI has been fixed. I upgraded to 10.6.3 (retail install) and tried the DVI-I (24+5) to HDMI cable and viola (using the 2pin spdif to the 2pin 9400GT connector) !! I had AUDIO and VIDEO over the HDMI cable !
Now I have upgraded to MSI 9500GT which has HDMI connector. This avoids the DVI-I (24+5) to HDMI adapter. Inside still remains same, 2pin spdif to 2pin spdif connector on the video card.
So, yes, 10.6.3 has audio+video over DVI-I(24+5) to HDMI OR straight thru HDMI support.
BTW, I have two DVI-I (24+5) to HDMI connectors. I bought one and since no sound was coming over HDMI, I bought another one. Only later I tried windows xp, and both were working. Then I realized that 10.6.2 must be busted.
So, up for sale, two working DVI-I (24+5) to HDMI.
Notice I keep repeating "DVI-I (24+5)" -- thats the key when looking for a connector which will send audio over DVI. Ignore what every one else says that DVI can't send audio.
This link gave me confidence to buy the DVI-I (24+5) to HDMI adapter.
http://www.amazon.co...#R1RMFCSSAWYPGE
I think I have repeated it enough times to convince people that it does work in 10.6.3