How do I connect my Bricasti M21 DAC to my MAC Computer using the Network (Ethernet)

@hgeifman- I have connected my Bricasti M12 to a Mac Mini server using the ethernet interface and this connection is very simple to set up. You would need a music player/organizer software like Audirvana/Roon/JRiver installed on the server which will handle all music files or the Qobuz connection in your case and send it to the player M21 over ethernet.
Once you install the music software on Mac computer, connect both the Mac computer and the Bricasti DAC M21 to the router using ethernet cable and complete a quick configuration on the music software you are ready to roll.
I use Audirvana because I like its performance on Mac better than the other two. As part of setting up the music software on Mac,
1. you have to select M21 as the player (the software would auto detect and list M21 as the DAC/player as soon as your M21 is connected to the network via ethernet cable) 
2. You have to connect to Qobuz using your account information
This will complete the entire set up process.
Hoe this helps.

@indranilsen, Thank your for that great information.  

Audirvana looks good.  I install it on my MAC Computer and set the Bricasti M21 DAC for IN5.   Is there a setting in Audirvana that outputs Qobuz to the M21?   Any other settings I need to know about?  

Can I use my iPad to connect to Audirvana on my MAC to select albums to play?   Thanks.....

@hgeifman- Yes you would be able to use any iPad to play your music through M21. You need to install Audirvana Remote on the iPad which will simply turn the iPad into an Audirvana remote.
In the Audirvana settings you will see a streaming section. When you open that you will see different streaming options like Qobuz, Tidal, etc. Select Qobuz and connect it with your user id and pwd. That will complete the Qobuz set up process (most likely) and you would be able to stream through Audirvana and play through M21.

Thanks.