I have an upgraded cMP 5,1 with BT4.0 & AC Wi-Fi card running Mojave 10.14.6 that works with everything continuity and handoff (including Apple Watch unlock) but I can’t get the Airplay to my Vizio 70” smartcast TV to work, it just goes to a black screen. 2012 MBP and iPhone XS Max both AirPlay to the TV fine...
Anyone have any idea what the problem might be?