Greetings,
The MTRX Studio when powering up looks to get an IP address from a DHCP server. Best case scenario would be to add an Ethernet Router to provide IP addresses for your workstation + MTRX Studio + any other devices you might connect to it. If you don't care to do that, I would recommend at least assigning static IP addresses to the workstation and MTRX Studio, since relying on the self-assigned 169 addressing on the Mac can be dicey, especially depending on how you turn on all of your devices from cold. You can get to the network configuration from DADman via Settings > Device List > (IP Address) > Right-Click and access Network Settings - then set Configure to Manually. Here's a screen shot of that configuration page:
Jeff