1. Open System Preferences from the Apple menu
2. Click on “Network”
3. Select your currently active network connection from the left menu (Ethernet) and then click on “Advanced” in the lower right corner
4. Click on the Hardware tab. Your MAC address is listed at the top of the Hardware tab
The address is always in the form aa:bb:cc:dd:ee:ff, looking something like “ce:9e:8d:02:1d:e9” or a variation of.