Unable to use USB connected Audio Zones after update to Roon 1.8 Build 903

Core #1: Mac Mini
Yosemite
Core #2: Synology NAS DS218+
Linux

Following the release of Roon 1.8 (Build 903), I updated both of my cores successfully. But following the update, Roon no longer detects any of the zones I had connected via USB. I have 2 DAC’s that no longer appear in Roon although MacOS 10.x does see them and can utilize them both. The new release does see my network endpoint but nothing connected to my Mac Mini.

Thoughts?
-David Albers

Similar problem since Build 903 update.
my USB Dac is no longer available, nor is the my May system audio. I can only see an Apple Airport Express which is connected to the LAN via WiFi.

Another thread about this problem :

A post was merged into an existing topic: Roon stopped seeing Audio Zones/DAC after update to build 903