I can no longer mirror the screen of my iMac desktop onto my Vizio TV. Both are on the same Wi-Fi network.
I have a third generation Apple TV box (2012) through which, until recently, I was able to mirror the screen of my iMac or iPhone onto my VIZIO TV and stream videos from the internet. AirPlay mirroring is no longer working. How can I reactivate it?
iMac 21.5″ 4K, macOS 12.3