Have followed the in-and-outs of this thread with interest...

Not much point for my main system but sounds like this might be interesting for a planned second system in my shed if it would work with my old (intel) Mac Mini running Snow Leopard using a Topping 2 as amp. The old Mac don't have an optical out so a DAC would be pointless but if I could link an SSD directly to the Pi setup ... or access Wifi to link to a NAS connected to the house router I am supposing it all could work

Does the Pi have WiFi or would that be another piggyback board required?
If so, can this all be controlled via the Mac (given it's limitations) or would I need a monitor card for the Pi?