Has there ever been a resolution to this issue? It looks like I'll be calling to chat with tech support next week, as I'm having the same issue with my Mac computers and the 990.
My Mac Mini had been connected via optical cable to my Onkyo TX-SR600 (circa 2002). When playing DTS encoded DVDs, I could select the appropriate digital output settings in the DVD player app, and the Onkyo detected DTS immediately without issue. However, the 990 can't detect DTS from the Mac.
Just to further complicate matters, the 990 has no problem detecting DTS from my Sony DVD player... only the Mac.
So the 990 and Mac just don't play nice together.
Has anyone at Outlaw attempted to duplicate this in-house? I'd consider sending a Mac Mini up there for them to test with if there's a chance they can resolve the issue with a firmware update.
- Jason