Sorry Jhelzei - let me explain what's the deal is. First of all I am lead dev. of macOS port. So straight from horse mouth
Both DOS2 and BG3 are pushing forward the Metal API on macOS because they actively use all the new features. We work together with Apple MetalEcosystem team to ensure game has the greatest performance and we strive to make game shine.
Unfortunately Metal is still in active development and compare Metal 2.3 vs DirectX 11 (!) - it's still very young API. That's why we use macOS 10.15.6 and not even 10.15.2 or .3 - it's because of the stuff that was done specifically to make BG3 work best.
HDR switch is from DOS2 launcher
that's why it has 10.14.2 which indeed looks funny.
Thank you for the love to Mac platform and I hope you will be able to play on Mac some day.
