From the main menu, choose Settings, and then click About or Network. Look for the MAC address next to "Ethernet Address" for the wired network or "Wi-Fi address" for the wireless connection. Alternatively, you may find the MAC address printed on the UPC label on the Apple TV box.
From Settings, select Network, and then Status. Your MAC address will appear on the screen.
From the Roku home screen, select Settings, and then About. The MAC address will appear on your screen. Alternatively, you can find the MAC address on the bottom or back of your Roku.
Sony Blu-Ray Disc player
Follow the instructions at https://www.sony.com/electronics/support/home-video-blu-ray-disc-players-recorders/bdp-s185/articles/00010388.
From the TiVo Menu, select Settings, and then choose Phone/Network. Your MAC address will appear on the page that opens.
Vizio Smart TV
Press the Menu button on the remote and select Network, and then Manual Setup. The RJ45 (wired) and/or Wireless MAC address will appear on the screen.
Seiki Smart TV
From Settings, go to Setup, and then Network, and then IP address. Both the wireless and wired MAC addresses are listed on this page.