I've been trying to fix a nagging issue with my Mac Mini. I'm hooking it up to a fairly high end receiver which most definitely does 7.1. I'm passing the sound via HDMI. There seems to be some handshake problem. The mini refuses to output 7.1. Annoyingly, Apple doesn't seem to want to let a user force the output. The mini thinks the receiver is only able to play stereo, so it just sends a stereo output. When I go into the midi setup, the options for multi-channel are greyed out. Anyone have any advice on dealing with this issue. I've read through a ton of forums and it seems to be a very common problem with no real fix. I can't exactly drag my receiver and 8 speakers into the Apple Store. Any advice is appreciated. Thanks.