Sorry I was talking about the graphics profile in Zwift, there are four different levels of detail “basic, medium, high and ultra”
Apple TV gets the “basic” profile - so no real shadows, very simple textures etc, I think that the recent mac mini’s get the “high” profile - which is absolutely fine for most people.
Only the “ultra” profile gets every single detail and texture that the guys and girls at Zwift have designed - i think only a PC or mac with a dedicated graphics card can show the “ultra” profile.