I was reading
https://www.apple.com/uk/apple-tv-4k/ to see what connectors it has (it doesn't say, so I never did find out whether it has HDMI) and saw
this:
Colour calibration
A perfect combo. Apple TV 4K works with your iPhone to automatically
adjust
colours to look their best. Just point the camera on your iPhone at your
TV
screen once, then sit back and see how amazing your shows and movies are
meant to look.
I have no use for an Apple TV, but this would be a wonderful thing to be able to do with my Macintosh screen.
Daniele
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)