Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)
Apple iMac.
Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)
NuForce DAC.
Description Of Issue
I want to connect Roon which is resident on my iMac to a non Roon DAC via USB out. Right now Roon is playing through the internal speakers even though both MIDI and Audio show that the NuForce DAC is selected
It looks like your one zone is not named — Can you try making sure that the Nuforce DAC in Settings > Audio is has a Zone name and then you can select that Zone from the Zone Picker?