Your Machine ID is your Ethernet ID/MAC address. It consists of 6 pairs of numbers and letters A-F. You may see these pairs un-separated (d312a930bc7f), separated by colons (d3:12:a9:30:bc:7f) or separated by dashes (d3-12-a9-30-bc-7f). To find your Machine ID, please follow the steps below: On Windows - Go to the Start menu, then in the search box type “cmd” and hit Enter. In the cmd window, type “ipconfig /all”. Find the line that reads “Physical Address”. This is your Machine ID. On Mac - Go to System Preferences > Network and select your active network interface (e.g., Ethernet). From the list on the left. Click on ‘Advanced…’, then on ‘Hardware’. The Machine ID is listed under “MAC Address”. On Linux - Open a terminal/shell window, and type “ifconfig”. Look for “Hwaddr” under eth0. This is your Machine ID.