Could Not Connect To Apple TV
In the past, I have successfully mirrored a TV program on our iMac to our HDTV using our Apple TV & AirPlay. Last night, I got the message on my iMac "Could Not Connect To Apple TV". WiFi is working. Apple TV software is up to date. iMac has current Yosemite software. Why all of a sudden this message? Help!
Apple TV, iOS 7.0.2