I have an iMac 18,3 running Sequoia 15.7.2 thru OCLP 2.4.1. It's primarily used to AirPlay content to my 4th gen Apple TV 4k. The iMac sees the Apple TV which is on the same Network and Apple ID. When I attempt to Screen Mirror, even though the audio works perfectly, I am met by a permanent black screen on the Apple TV that remains until I stop mirroring my screen. The thumbnail preview on the iMac shows everything as if it is working correctly, so it is as if the signal is getting blocked between the iMac and the Apple TV somehow.
Apologies if this has been answered before, I have seen others on this sub with the same issue, but none with a definitive answer.
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