mac mini into a hires streamer

I would like my Mac mini to out put hires to my new dac, the Nuprime DAC-9 and don't know ho to do it. I did a few years ago have my mac upgraded/optimized for cd playback 16/48 and it won't output any higher and was old by someone that it depends on my MAC OS? The end goal is to do this so I can try the different resolutions on Amazon Prime HD.

THX in advanced,
Tom