No monitor physical dimensions on MacOS

[JC3]

On MacOS 13.5, the height_mm and width_mm fields of the monitor info are reported as None.

I saw that you're not doing OSX dev; but I figured I'd throw this here to track the issue anyways.

[JC3]

Maybe some helpful soul will shed some light on a solution at https://stackoverflow.com/questions/77469944/getting-physical-dimensions-of-screen-in-macos.

[JC3]

Found this: https://gist.github.com/nicksherman/33f400e8577f93ab6ecdecdd4306985a

[JC3]

Can confirm above gist works; tested getting it on macOS 13.5 given an NSScreen like this:

screen = NSScreen.screens()[index]
number = screen.deviceDescription()["NSScreenNumber"]
width_mm, height_mm = CGDisplayScreenSize(number)

Will try to make a PR.

It does introduce an extra dependency on pyobjc-framework-Quartz on macOS but I don't think that is a problem.