Audio Bit Schlepping

I’ve been an audio hobbiest for 40 years. I began by building a Dynaco Stereo 70 power amplifier and PAS-3 preamp from kits in 1967. Over the years a Conrad Johnson PV-1 preamp, Gas Ampzilla power amplifier, and Dhalquist DQ-10 speakers have come to stay. Sources have come and gone over the years with a Cambridge Audio 610 tuner and Cambridge Audio DacMagic being my current sources. Much of my music lives on a Drobostore storage array connected to a Mac Mini running OS X Lion (10.7). How do the bits get from the Drobostore to the DacMagic?