Replace Mac mini with another Ethernet source-what?

[audio_engr]

Nativ Vita is working currently on Roon end point requirement and Roon is not available. No MQA for 1599$.

Could you please elaborate more on this " Nativ Vita is working on Roon end point requirement "  ?

I'm a bit of a newbie on this ... 

You would need also a machine running ROON Core (for example a mac mini or Intel NUC) if you want to use ROON with the Native Sound Vita. But you could also use the Vita as a standalone streamer with the Native Sound OS (without ROON and without a ROON Core machine).

The Vita is one of the rare devices with Apple Music (and many other platforms) implemented.

Many thanks for your comments & suggestions but let me try and understand it better ... 

Presently, I use my Macbook Air running Roon core and a 4TB External Hard drive formatted for macOS connected to my Macbook Air thru Thunderbolt. My music files are ALAC and they could be used either thru iTunes OR Roon core. The Macbook Air connects to my D400 via ethernet using Roon-Air. 

1. I wish to replace my Macbook Air with Nativ VITA. I would like to attach my 4TB External Hard drive to the VITA using USB (but this External Hard drive is formatted with macOS). The External Hard drive has both Thunderbolt & USB.   
Is this possible ?

2. Next, using the VITA, I would connect to my D400 using AES/XLR. 

3. If 1 & 2 are possible, what would be my limitations using this VITA system over the Macbook Air system that I'm presently running ?

P.S. I just received a mail from Nativ marketing that they are offering the VITA with $500 discount from their $1,599 price.