I have a Macbook Pro (early 2013) with OS X El Capitan 10.11.5 and plenty of memory. I’m using Roon software running through a MSB Analog DAC and a high-end stereo system. I’m try to play a downloaded 24bit 352.8Hz FLAC audio file and Roon is converting it to 176.4Hz. Why? I thought Roon supported resolutions all the way up to 24 bit 384Hz, as does the MSB Analog DAC.
It’s connected by a high-quality USB cable, which runs from the MacBook to the MSB Analog DAC. I’ve attached a screenshot of the DAC’s settings in Roon. As you can see, the highest PCM level is 192Hz.