Getting the correct MAC address for registration is a simple process.
- Open the Crestron Toolbox program
 - Launch the Device Discovery Tool
 - Once loaded connect to your processor by double clicking on it in the discovered device list on the left of the window.
                                    

 - Once connected you will see the available MAC addresses on the report section of the window.
If there is only a single MAC then that is the one you need,
IF however there are multiple MAC addresses shown then you want the FIRST listed MAC address in the list.