Windows OS
1. Open the Start Menu and type 'cmd'
2. In the Command Line window that opens, type 'getmac /v'
3. Write down MAC address (e.g. aa-bb-cc-11-22-33) for the Ethernet connection
Mac OSX
1. Click the Apple in the top left corner, and select 'System Preferences'
2. Go to network
3. Select your Ethernet connection in the left-hand pane, then select 'Advanced...'
4. Go to the Hardware Tab and write down the MAC address (e.g. aa:bb:cc:11:22:33)