MAC = Media Access Control
The MAC address is in format xx:xx:xx:xx:xx
To find your MAC address, from the Apple menu, select System Preferences. From the View menu in System Preferences, select Network.
To find your MAC address go to Start. Type cmd in the Search bar. Type ipconfig -all . Scroll up to section, "Ethernet Adapter Local Area Connection." The MAC address is the string of letters and numbers next to Physical Address.
/sbin/ifconfig -a | grep HWaddr
will return all the MAC addresses on the machine. The wired one will be called something like eth0, em1, p2p1, and so on. The wireless one should be called something like wlan0.