metal: Try and see if this lets VSync turn off.

(cherry picked from commit 9558b37716)

Ryujinx.sln

@@ -80,11 +80,16 @@ EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ryujinx.Horizon.Kernel.Generators", "src\Ryujinx.Horizon.Kernel.Generators\Ryujinx.Horizon.Kernel.Generators.csproj", "{7F55A45D-4E1D-4A36-ADD3-87F29A285AA2}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ryujinx.HLE.Generators", "src\Ryujinx.HLE.Generators\Ryujinx.HLE.Generators.csproj", "{B575BCDE-2FD8-4A5D-8756-31CDD7FE81F0}"
+EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ryujinx.Graphics.Metal", "src\Ryujinx.Graphics.Metal\Ryujinx.Graphics.Metal.csproj", "{C08931FA-1191-417A-864F-3882D93E683B}"
 	ProjectSection(ProjectDependencies) = postProject
 		{A602AE97-91A5-4608-8DF1-EBF4ED7A0B9E} = {A602AE97-91A5-4608-8DF1-EBF4ED7A0B9E}
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ryujinx.BuildValidationTasks", "src\Ryujinx.BuildValidationTasks\Ryujinx.BuildValidationTasks.csproj", "{4A89A234-4F19-497D-A576-DDE8CDFC5B22}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ryujinx.Graphics.Metal.SharpMetalExtensions", "src/Ryujinx.Graphics.Metal.SharpMetalExtensions\Ryujinx.Graphics.Metal.SharpMetalExtensions.csproj", "{81EA598C-DBA1-40B0-8DA4-4796B78F2037}"
+EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{36F870C1-3E5F-485F-B426-F0645AF78751}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
@@ -94,8 +99,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		.github\workflows\release.yml = .github\workflows\release.yml
 	EndProjectSection
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ryujinx.BuildValidationTasks", "src\Ryujinx.BuildValidationTasks\Ryujinx.BuildValidationTasks.csproj", "{4A89A234-4F19-497D-A576-DDE8CDFC5B22}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -265,6 +268,10 @@ Global
 		{C08931FA-1191-417A-864F-3882D93E683B}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C08931FA-1191-417A-864F-3882D93E683B}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C08931FA-1191-417A-864F-3882D93E683B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{81EA598C-DBA1-40B0-8DA4-4796B78F2037}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{81EA598C-DBA1-40B0-8DA4-4796B78F2037}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{81EA598C-DBA1-40B0-8DA4-4796B78F2037}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{81EA598C-DBA1-40B0-8DA4-4796B78F2037}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/Ryujinx.Graphics.Metal.SharpMetalExtensions/CAMetalLayerExtensions.cs

@@ -0,0 +1,21 @@
+using SharpMetal;
+using SharpMetal.ObjectiveCCore;
+using SharpMetal.QuartzCore;
+using System.Runtime.Versioning;
+// ReSharper disable InconsistentNaming
+
+namespace Ryujinx.Graphics.Metal.SharpMetalExtensions
+{
+    [SupportedOSPlatform("OSX")]
+    public static class CAMetalLayerExtensions
+    {
+        private static readonly Selector sel_displaySyncEnabled = "displaySyncEnabled";
+        private static readonly Selector sel_setDisplaySyncEnabled = "setDisplaySyncEnabled:";
+        
+        public static bool IsDisplaySyncEnabled(this CAMetalLayer metalLayer) 
+            => ObjectiveCRuntime.bool_objc_msgSend(metalLayer.NativePtr, sel_displaySyncEnabled);
+
+        public static void SetDisplaySyncEnabled(this CAMetalLayer metalLayer, bool enabled) 
+            => ObjectiveCRuntime.objc_msgSend(metalLayer.NativePtr, sel_setDisplaySyncEnabled, enabled);
+    }
+}

src/Ryujinx.Graphics.Metal.SharpMetalExtensions/Ryujinx.Graphics.Metal.SharpMetalExtensions.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  
+  <ItemGroup>
+    <PackageReference Include="SharpMetal" />
+  </ItemGroup>
+</Project>

src/Ryujinx.Graphics.Metal/Ryujinx.Graphics.Metal.csproj

@@ -5,12 +5,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\Ryujinx.Common\Ryujinx.Common.csproj" />
+      <ProjectReference Include="..\Ryujinx.Common\Ryujinx.Common.csproj" />
-        <ProjectReference Include="..\Ryujinx.Graphics.GAL\Ryujinx.Graphics.GAL.csproj" />
+      <ProjectReference Include="..\Ryujinx.Graphics.GAL\Ryujinx.Graphics.GAL.csproj" />
-    </ItemGroup>
+      <ProjectReference Include="..\Ryujinx.Graphics.Metal.SharpMetalExtensions\Ryujinx.Graphics.Metal.SharpMetalExtensions.csproj" />
-
-    <ItemGroup>
-      <PackageReference Include="SharpMetal" />
     </ItemGroup>
 
     <ItemGroup>

src/Ryujinx.Graphics.Metal/Window.cs

@@ -1,6 +1,7 @@
 using Ryujinx.Common.Logging;
 using Ryujinx.Graphics.GAL;
 using Ryujinx.Graphics.Metal.Effects;
+using Ryujinx.Graphics.Metal.SharpMetalExtensions;
 using SharpMetal.ObjectiveCCore;
 using SharpMetal.QuartzCore;
 using System;
@@ -140,7 +141,15 @@ namespace Ryujinx.Graphics.Metal
         
         public void ChangeVSyncMode(VSyncMode vSyncMode)
         {
-            //_vSyncMode = vSyncMode;
+            switch (vSyncMode)
+            {
+                case VSyncMode.Unbounded: 
+                    _metalLayer.SetDisplaySyncEnabled(false);
+                    break;
+                case VSyncMode.Switch:
+                    _metalLayer.SetDisplaySyncEnabled(true);
+                    break;
+            }
         }
 
         public void SetAntiAliasing(AntiAliasing effect)