Are you talking about support under Asahi because MacOS definitely does have support:

> Display Support

> Simultaneously supports full native resolution on the built-in display

> at 1 billion colors and:

>

> Up to two external displays with up to 6K resolution at 60Hz at over a

> billion colors (M1 Pro) or

> Up to three external displays with up to 6K resolution and one external

> display with up to 4K resolution at 60Hz at over a billion colors (M1 Max)

>

> Thunderbolt 4 digital video output

>

> Native DisplayPort output over USB‑C

> VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold

> separately)

>

> HDMI digital video output

>

> Support for one display with up to 4K resolution at 60Hz

> DVI output using HDMI to DVI Adapter (sold separately)

https://support.apple.com/kb/SP854?viewlocale=en_US&locale=e...