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Doing some quick searching around.

I know there is Crossover, Wine technically works on Mac from what I can tell also. So not sure if there is a technical reason Proton couldn't work on Mac other than just not building it.

Apple does talk a lot about gaming now on the iPhone and iPad, I would love to see them talk about it more on Mac (especially with how powerful these are) and maybe work with Proton like Steam is for the Steam Deck.

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Proton also depends on DXVK, an additional translation layer that specifically bridges the Windows graphics APIs to Vulkan (as opposed to WINE handling its system calls in a general sense).

Meanwhile, newer versions of macOS (and the M1 that runs the ARM builds in particular) don't use Vulkan at all, opting for Metal instead.

Crossover is proprietary. Pure Wine cannot run x86 apps on ARM if I understand correctly.

It can't, but if you use Linux and binfmt_misc, you can set it up so that x86 Windows apps run seamlessly on ARM.

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