The Mac version of MC is audio only, and will likely remain that way throughout MC19.
The Windows version of MC can handle DTS-MA decoding with a little elbow grease. If you have HDMI out, and you prefer, it can also bitstream it and let your receiver decode it. That kind of passthrough is called Bitstreaming.
I'd guess that bitstreaming of audio-only DTS-MA files is not supported on the Mac version currently (since none of the video stuff is enabled, and that's a video option in the Windows version), but I don't know, and don't have any with which to check.
You can run the Windows version on your Mac Mini either via Boot Camp or Parallels Desktop. Both work very well. VMWare Fusion probably also works, though in last year's version, I had some trouble with video playback performance in Fusion. I haven't tried the new one yet, but I have and use MC in Parallels on my Mini and my Macbook Pro basically every day, and it works very well.