On Mac Os 11.6, display P3 iMac 500nits(?), R17 my results are:
– Timeline and Output Rec2020/ST2084 1000 nits
– 'Use mac viewers' checked
– 'Use HDR on viewers if available' checked
Output viewed in QTX, Movist Pro, displays Apple's pseudo HDR mapping (watch the brightness climb in highlights momentarily during playback).
The Resolve viewer (poor-man's monitor) is not tone-mapping correctly (highlights completely blown) and doesn't match the QT player for luma values. I have to use an HDR simulation LUT on the last node to make it visually match the QT export.
Unchecking 'Use mac viewers' produces the 'flat' image in the viewer.
Watching the QT file on my Panny HDR screen matches and exceeds the QTX player.
Andrew Kolakowski wrote:If you tick use Mac viewers option on Mac then whatever Resolve generates internally (eg final PQ data) is taken by OSX color manage system and mapped to display profile. Exactly the same as QT X or any other color managed OSX app does.
I conclude that the Resolve viewer is not mapping the excess luma values in the same way as QTX is doing.
*PS If you don't have access to a declink card, or box to directly monitor HDR, but you do have a decent HDR TV handy, you can get a quick and dirty idea of final HDR output by using the Google Chromecast dongle on the TV, and using this App
https://airflow.app/ (I'm not affiliated or paid) to quickly stream an output file to it in HDR. Very useful for a quick check.