i came from Audirvana software that was bugging for me at maximum rate for my DAC, yes upsampling files i found better.
JRiver too is buggy for me not at 176/192 rate upsampling, but like A+ at 352/384...
but JRiver can bitstream in DSD and output files in DSD or 2xDSD for my DAC....
Yes i agree it is not MAC, like it should be in many places...
but in the end, remote is way better, editing files too, and sound is great too, but different from A+....
Go MAC teams JRiver, be the best...