macos: fix Vulkan/Metal renderer on macOS 26+ and bump MoltenVK (#2149)

* macos: fix Vulkan/Metal renderer on macOS 26+ and bump MoltenVK

Four related changes that together let the Vulkan backend boot a game
on Apple Silicon Macs running macOS 26.x. Each is needed independently;
the combination was tested on a Mac16,6 (M4 Max) / macOS 26.4.1.

CMakeModules/DownloadExternals.cmake:
  Bump bundled MoltenVK from v1.2.9 to v1.4.1. v1.2.9 does not
  recognize macOS 26 surface objects and traps with an Objective-C
  "unrecognized selector" inside vkGetPhysicalDeviceSurfaceCapabilitiesKHR.

src/video_core/renderer_vulkan/vk_instance.cpp:
  Disable VK_EXT_tooling_info on MoltenVK. MoltenVK advertises the
  extension but does not expose vkGetPhysicalDeviceToolPropertiesEXT
  through its dispatcher, so the call inside CollectToolingInfo()
  trips a vulkan-hpp assertion in Debug and dereferences NULL in
  Release.

src/citra_qt/bootmanager.cpp:
  Force-install a fresh CAMetalLayer on the NSView before handing it
  to createMetalSurfaceEXT. Qt 6.11's QWindow::MetalSurface does not
  always back the view with a CAMetalLayer on macOS 26, and MoltenVK
  1.3+ aborts in MVKSurface::getNaturalExtent() if the layer is not
  the right class. Implemented via objc_msgSend so no .mm conversion
  is needed.

src/citra_meta/CMakeLists.txt:
  Gate LaunchScreen.storyboard behind 'if (IOS)'. The storyboard is
  iOS-only and previously broke the Xcode generator on macOS with
  "iOS storyboards do not support target device type 'mac'."

* Move Metal layer creation logic into MetalUtil::CreateMetalLayer ObjC++ function

This change makes the code much more readable, as the logic is now in its native language

---------

Co-authored-by: SergeyMild <>
Co-authored-by: OpenSauce04 <[email protected]>

CMakeModules/DownloadExternals.cmake

@@ -174,7 +174,7 @@ function(download_moltenvk)
     set(MOLTENVK_TAR "${CMAKE_BINARY_DIR}/externals/MoltenVK.tar")
     if (NOT EXISTS "${CMAKE_BINARY_DIR}/externals/MoltenVK")
         if (NOT EXISTS ${MOLTENVK_TAR})
-            file(DOWNLOAD https://github.com/KhronosGroup/MoltenVK/releases/download/v1.2.9/MoltenVK-all.tar
+            file(DOWNLOAD https://github.com/KhronosGroup/MoltenVK/releases/download/v1.4.1/MoltenVK-all.tar
                 ${MOLTENVK_TAR} SHOW_PROGRESS)
         endif()