A VERY long interaction (4 hours in total) with Apple Support - to no avail - led me to some research. My iMac (2017 Intel) doesn't have Air Play. Support had no idea why. Wanted to patch it with my iPhone, made all sorts of irrelevant claims and were clueless. BUT - it does seem that hardware requirement for an iMac to have Air Play are Top Secret.
Does anyone know of a detailed and reliable list regarding iMacs and Air Play?
Does anyone know of a detailed and reliable list regarding iMacs and Air Play?