OK, now I am lost - just bought Audirvana Plus to deal with my increasingly lossless collection, my Nuforce DAC and a couple of hi-fi speakers. But it does NOT work when CDs are played from iTunes, or to play any system/game sounds. It simply transfers everything to the iMac's internal speakers. Is this normal behavior? Can I force those sounds to be played through the DAC as well? Thanks for your urgent reply!