As new macs use local dimming and have up to 1600nits of brightness,they are ,i think, compatible with HDR10+ and EVEN Dolby vision
Are they both supported?(DV doesn’t seem to be) ,and will you implement support for it ?
I’d assume it’s easier since it’s only for internal display
Dolby vision profile 5 will come to Mac shortly. You can follow this thread. Hdr10+ isn’t support by Apple in any device so I wouldn’t hope for that atm.