From f36906df6c4afd16591a85648d385350675a96d6 Mon Sep 17 00:00:00 2001
From: Roman Rihter <teledurak@gmail.com>
Date: Tue, 10 Jun 2025 03:00:31 +0300
Subject: [PATCH 1/3] Add portability enum

---
 src/vk/Enums.cs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 src/vk/Enums.cs

diff --git a/src/vk/Enums.cs b/src/vk/Enums.cs
new file mode 100644
index 0000000..26ce96a
--- /dev/null
+++ b/src/vk/Enums.cs
@@ -0,0 +1,16 @@
+namespace Vulkan
+{
+    public enum VkInstanceCreateFlagBits: uint {
+        /// <summary>
+        /// Provided by VK_KHR_portability_enumeration. Specifies that the instance will enumerate
+        /// available Vulkan Portability-compliant physical devices and groups in addition to the
+        /// Vulkan physical devices and groups that are enumerated by default.
+        /// </summary>
+        PortabilityBitKHR = 1,
+    };
+
+    public static partial class RawConstants
+    {
+        public const VkInstanceCreateFlagBits VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR = VkInstanceCreateFlagBits.PortabilityBitKHR;
+    };
+}

From c87618f2abcb37838122f0e8faba6ca083669088 Mon Sep 17 00:00:00 2001
From: Roman Rihter <teledurak@gmail.com>
Date: Tue, 10 Jun 2025 03:01:26 +0300
Subject: [PATCH 2/3] Use libMoltenVK on macOS

---
 src/vk/Commands.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/vk/Commands.cs b/src/vk/Commands.cs
index 7583757..ca8c2b4 100644
--- a/src/vk/Commands.cs
+++ b/src/vk/Commands.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.InteropServices;
@@ -47,7 +47,9 @@ private static string GetVulkanName()
 #endif
             else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
             {
-                return "libvulkan.dylib";
+                // libvulkan.dylib is an additional translation layer from Vulkan SDK.
+                // libMoltenVK supports libvulkan functions already.
+                return "libMoltenVK.dylib";
             }
             else
             {

From ef1d8a217d0443497ea7f26f443b153a979b3d8e Mon Sep 17 00:00:00 2001
From: Roman Rihter <teledurak@gmail.com>
Date: Tue, 10 Jun 2025 03:01:54 +0300
Subject: [PATCH 3/3] Try to load MoltenVK from Homebrew on macOS

---
 src/vk/Commands.cs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/vk/Commands.cs b/src/vk/Commands.cs
index ca8c2b4..e98f30d 100644
--- a/src/vk/Commands.cs
+++ b/src/vk/Commands.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.InteropServices;
@@ -162,6 +162,18 @@ protected override IntPtr LoadLibrary(string libraryName)
                         string localPath = Path.Combine(baseDir, libraryName);
                         handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);
                     }
+
+                    if (handle == IntPtr.Zero && RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) {
+                        // Try to load system-wide MoltenVK from /usr/local/lib or /opt/homebrew/lib.
+                        // It is not possible to install MoltenVK under /usr/lib on macOS due to System Integrity Protection.
+                        string localPath = Path.Combine("/opt/homebrew/lib", libraryName);
+                        handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);
+
+                        if (handle == IntPtr.Zero) {
+                            localPath = Path.Combine("/usr/local/lib", libraryName);
+                            handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);
+                        }
+                    }
                 }
 
                 return handle;