[ryao]

Off the top of my head, here is what that needs:

  1. Implementing PR_SET_SYSCALL_USER_DISPATCH
  2. Implementing ntsync
  3. Implementing OpenGL 4.6 support (currently only OpenGL 4.1 is supported)
  4. Implementing Vulkan 1.4 with various extensions used by DXVK and vkd3d-proton.

That said, there are alternatives to those things.

  1. Not implementing this would just break games like Jurassic World where DRM hard codes Windows syscalls. I do not believe that there are many of these, although I could be wrong.
  2. There is https://github.com/marzent/wine-msync, although implementing ntsync in the XNU kernel would be better.
  3. The latest OpenGL isn't that important these days now that Vulkan has been widely adopted, although having the latest version would be nice to have for parity. Not many things would suffer if it were omitted.
  4. They could add the things needed for MoltenVK to support Vulkan 1.4 with those extensions on top of Metal:

https://github.com/KhronosGroup/MoltenVK/issues/203

It is a shame that they do not work with Valve on these things. If they did, Proton likely would be supported for MacOS from within Steam and the GPTK would benefit.