Your printer has WiFi connectivity support. The MAC address is found by using the tools supplied with your printer. If you install the printer on your computer, you will have wizard applications ready to guide you how to add the device to your network shares. One of those wizards will ask you to set up the network details for the printer to be recognized and installed. On that screen, you will also see printer's address among other network details. The MAC address is just like the one of your regular network component from your PCs.