how do you know your mac address

Go to the Network system preferences, and then select your Ethernet or Wi-Fi connection (depending on which you are using for your connection). Then click the Advanced button and then the "Hardware" tab, and you should see the "MAC Address" listed.

Click on Apple icon on top left of screen.

Click on About This Mac.

Click on More Info.

Click on System Report

On left sidebar, click on Network.

Click on Locations.

Now on the righthand side, you will see Hardware (MAC) address