I just tried the new lunar version and now we have the option to go past 500nits in non-HDR content.
From the changelog:
From the changelog:
- XDR Brightness: go past the 500 nits limit of the new 2021 MacBook Pro and Pro Display XDR
- Warning: this is experimental. The system may become unresponsive for a few seconds when toggling this option
- Animation glitches are expected when this is enabled