Nuwrly et al…
I did have success with my desktop MacPro 2008; it saw the BDP3 and Bingo!
Going back to the MacBook Pro 2010 laptop, activating it as the Core and messing around had me delving further into the Firewall settings. The BDP3 was recognized. Functioning and sounding pretty good I may add.
Despite feeling like a bit of the “horse’s arse.” for not getting to this sooner, I certainly appreciate all the help (and patience) you all professed. Now to put all my music on the laptop’s SSD and see what this Roon can do.
More to Come!
Cheers!