I like this thread. I too am trying to use my mac dac instead of buying external. However, this is weird what apple is saying...the only way for my early 2015 MBP to sample high res, 192, /24 etc...is using a mini toslink. My receiver does not have optic input just RCA, so I have been using 3.5 audio to RCA (not mini toslink) to me, it should be analogue through the internal DAC right from the headphone jack....right? or am I missing something?