I may have found an app that disables dithering on mac, please test. Already posted in dithering thread.
I have noticed on iphone, when I use the setting reduce white point by 80%, the phone is very bearable. It was not as much before the eye therapy and some basic fixing, but many people here also mentioned it was very fine with this option. I blame it on LEDs being too bright in the whites, triggering heterophoria symptoms (when you have heterophoria, youre more sensitive to glare and brightness).
So I was trying to find a software that can reduce white point on Mac. I found Gamma Control 6. Its not for free and the price is not very nice (20$ or so), but I decided Ive got nothing to lose. I tried reducing white point (down to 0,30) and it immediately created banding on the display similar to samples of dithering switched off. I feel a lot of relief, but I need to test it first, reading and writing text being the ultimate test. If I get no headache, this will be a breakthrough, we could contact the creator of the software, ask what its doing and figure out a possible solution. Please, if you dont mind spending this money and have a mac, test it so I can know if its also good for you. There might even be a trial version if you dont get it directly from app store.
I wanted to take prinscreen samples, but the function seems to take the photo without the banding which is really weird to me.