-Shyko wrote

Xex-Jakee wrote @HTTK you can't change a devices MAC address on a router. You can however run terminal and change it. a MAC address looks like this aa:bb:cc:dd:ee:ff but with numbers also. To find your current mac address type ifconfig en1 | grep ether and it will come out with your mac address after "ether" like "ether aa:bb:cc:dd:ee:ff". You probably want to write it down or you can just reboot to reset the mac address to the original. Remember that after you reboot you'll have to spoof the address again. To find other mac addresses you'll need to log into your routers ui (192.168.1.1 or 192.168.0.1) are the two usual ones. To do the spoofing you type "sudo ifconfig en1 ether NEWMACADDRESSHERE" and then enter the root password. There you go, you've spoofed your MAC address.

How would I pull up the terminal?

That I don't know because I've only used a hackintosh (It was very poorly installed) But if I were you I would search 'Terminal' in the spotlight search function