NControl is unable to discover any Aurora(n)-Dante devices on macOS

When NControl is first launched, macOS may ask the user to allow NControl to find devices on the local network. 

If this is not allowed on the first launch, then NControl will not be able to discover Dante devices and macOS will never ask again.

To allow NControl to discover Dante devices, go to Settings > Privacy & Security > Local Network and enable NControl: