During the installation, a "System extension blocked" message shows up, click on OK to unlock the Merging kernel extension.
In your System Preferences, access the Merging RAVENNA/AES67 Settings to configure : The number of Inputs and Outputs you need. The Latency / buffer size (Standard VAD can only run in AES67-48 samples mode. The Frequency is usually handled by your DAW application.
Set the Merging RAVENNA/AES67 driver as Playback Engine for your favorite DAW :
Reaper x64
Logic Pro X
Pro Tools 12
MAC OSX
In Applications > Merging Technologies Folder, find MT Discovery. As soon as RAVENNA device is connected to a valid ethernet port (or ethernet adapter), you can access the devices by double-clicking on it in MT Discovery :