Thanks for your help above. I sold my Aurender N10 Music Server and ordered the Aurender N20 Music Server. Our best estimate of a delivery date is mid-November (we hope). My Aurender N20 Server is my main source of music.
I asked Audirvanna Customer Support about my DAC connectivity issue. They responded with "Audirvana will not cause malware on your computer if you enable the Firewall just for Audirvana. We need access to your network to connect to UPnP DAC, streaming services and for the Remote app. If you also block Audirvana with your Firewall you will get a message once a week about your license, as we need to check your license, and this can only be done through your internet connection”.
In any case, regardless of their explanation, and the comments I received above, I am NOT willing to open up my MAC Firewall. The Firewall security settings on my MAC Computer are set to block ALL incoming connections. This means Audirvanna is UNABLE to connect to and recognize my Bricasti M21 DAC.
Yes, I am a VERY paranoid about computer security and FEEL better if the firewall on my MAC block these incoming transactions. I am not willing to compromise my MAC Computer Firewall security for an audio connection. This may, or may, not make any sense, but I am okay with my decision. Audirvanna is not a must have.
I am using the MConnect HD Player App ($5.99) for QoBuz access and it works great. It is connecting to the Ethernet connection in my Bricasti M21 DAC. However, when I go to my QoBuz favorites, the album covers are VERY SMALL and hard to read. Their Application needs to be updated to make these QoBuz favorite album covers larger. I emailed them 4 times and am still waiting for their response. As of today, I have heard nothing from MConnect.
As was suggested above, AND my retailer. I know that ROON is another solution. However, since my Aurender N20 is my main music source, ROON is not required for my application.
Thanks again for your help.