Is using an Apple Computer a weak link...?

Dedicated streamers are just computers that have been optimized for audio performance.   Compared to a bog standard PC they tend to have better parts, better power supplies, and inject less noise. Programs such as Audirvana do help the sound from a computer.
The noise issue is real, but it isn’t like like vinyl, where it sounds like frying bacon.  It is mainly the depth of the black background.  Compared to better equipment, the music just doesn’t seem to emerge from nothingness, and therefore seems a little less tactile.  You don’t really notice it until you compare with better equipment.

@audiotroy 

my first sentence was “Streamers are just computers that have been optimized for audio performance “

Your post isn’t a refutation, it just supplies the details for a particular streamer that you sell.  It’s still a computer.
Why am I being so pedantic?  Because while I am sure that what you sell is a fine product, my point is that the vast majority of streamers are bound to offer some advantage over a standard, multi functional personal computer, because they have been optimized to do just 1 task that such a computer has to perform.  For a newbie, it might make more sense to compare a more entry level model to a personal computer.  Then, if the experience takes and funds allow, start going after premium products such as the one you sell.