The McIntosh server compresses the data, (FLAC lossless), the Yamaha does not. The Mac really does need not only a display, but an internet hook-up also for best use. It downloads cover art and text.
I own the Yammy and it too, for ease of use, needs a monitor, but you don't "really" need one. I simply purchased a cheap portable dvd player with a composit video in so as to view the self labeled discs.
The Yammy is $800.00, the Mac is over $3k I think. You decide!