MoltenVK VS MoltenVK

You could try replacing the wrappers libMoltenVK.dylib found in /Frameworks with the one I’d just uploaded https://github.com/The-Wineskin-Project/MoltenVK/releases/download/v1.2.3/macos-1.2.3-g5cbeaaa-UE4hack-zeroinit-dxvk.tar.xz

Here's the Roguelike third-person shooter Unreal Engine 4 game called Crab Champions that seems to be working thanks to the people who made the UE4 Moltenvk fix (https://github.com/The-Wineskin-Project/MoltenVK/releases).

However, it looks like the latest libMoltenVK (macos-1.2.3-g7b9a415a-UE4hack-Wideline-zeroinit) (huge thanks to Gcenx and nastys/italomandara!) allows the game to work almost perfectly (at least in the few minutes I've been testing).

There’s no need to build MoltenVK from source you can grab prebuilt archives from https://github.com/The-Wineskin-Project/MoltenVK

If this game uses DXVK then try using the following build https://github.com/The-Wineskin-Project/MoltenVK/releases/download/v1.2.0/macos-1.2.0-pr1678-UE4hack-Wideline-zeroinit.tar.xz

You could instead grab an archive from my mirror https://github.com/The-Wineskin-Project/MoltenVK/releases

https://github.com/Gcenx/MoltenVK/releases/tag/v1.1.7 apply these to your crossover and see how it works.

I was testing this version of MoltenVK (Macos_dxvk_patched-1.1.8.tarxz) (https://github.com/Gcenx/MoltenVK/releases/tag/v1.1.8) and I was able to able to get in the game. Before this the game was able to get to the Manu but would just black screen after starting.

The same is true for MoltenVK don’t use the upstream releases/VulkanSDK, instead use https://github.com/Gcenx/MoltenVK

https://github.com/KhronosGroup/MoltenVK

Translating between rendering APIs is not really the problem. The GPU design is more different than the API is.

Khronos maintains MoltenVk though, which is "official" as it gets: https://github.com/KhronosGroup/MoltenVK

...technically, Vulkan on Windows is also only supported via 3rd-parties (the GPU vendors), Microsoft doesn't support Vulkan either ;)

MoltenVK implements large parts of Vulkan on top of Metal for Apple systems. It isn't full Vulkan but it makes porting Vulkan games to OS X easier.

That's cool. Maybe I haven't thought enough about this. Let me check it out. FWIW it's this PR that you are referring to I think: https://github.com/KhronosGroup/MoltenVK/pull/1815/

For Metal specifically, they could adopt and contribute to Vulkan and get access to a lot more software. Right now you need to use a compatibility layer, and surely Apple could just support both APIs natively with much lower overhead. But they don't, because it nudges developers to stick to the Apple ecosystem instead of being able to support multiple platforms.

At the moment the most promising thing is MoltenVK (DX12 -> DXVK -> Vulkan -> MoltenVK -> Metal), but the development is not that quick mainly because there aren't tons of developer that works at the same time on the project. It's not actually a Metal related problem at the moment (they have a road map of things that they can be achieved with Metal 3 like Mesh shader and Geometry shader).

What you asked is already existed for at least 8 years. Yeah EIGHT years. It's called "MoltenVK". So far it's the only implementation of Vulkan for macOS. Basically it's a wrapper that runs on top of Metal API.