Hi dreddroitt...
You can connect both via lan if the music resides on your mac if you want a hardwired connection. Or you can use airplay or Bluetooth for a wireless config. I have uploaded all my music onto WD my cloud drive, and use it as a NAS. And then stream same via lan through a hard wired connection. I use the music cast app on my tablet to control everything. Works very well for me. Though I haven't tried playing directly fro my pc via lan.