@djones51, Thanks for your explanation. Obviously, I do not fully understand and am WAY over my head. This means I need help.
As I understand it, Firewalls block incoming connections. Some firewalls also allow you to block outgoing connections, but the built-in firewalls on MAC does not work in this way. I was told that if you want a firewall that will allow you to choose which programs get to connect to the Internet or not, look elsewhere. An incoming connection is only a problem if there are applications listening for these incoming connections.
Based on my application, it seems, the only device I have listening for these incoming connections is my Bricasti M21 DAC. Assuming this is true, it means if I open the Firewall, it will allow the incoming connection to be received by my Bricasti DAC and Audirvana will work.I am a little paranoid about computer security and FEEL better if the firewall on my MAC blocks these incoming transactions. I still do not understand how the connection blocking prevents Audirvana from working and MConnect works fine.
How do the MConnect connections get through? Thanks again for your help.