Try again

src/Ryujinx/UI/Renderer/EmbeddedWindowMetal.cs

@@ -1,14 +1,20 @@
 using SharpMetal.QuartzCore;
-using System.Runtime.Versioning;
+using System;
 
 namespace Ryujinx.Ava.UI.Renderer
 {
-    [SupportedOSPlatform("macos")]
     public class EmbeddedWindowMetal : EmbeddedWindow
     {
         public CAMetalLayer CreateSurface()
         {
-            return new CAMetalLayer(MetalLayer);
+            if (OperatingSystem.IsMacOS())
+            {
+                return new CAMetalLayer(MetalLayer);
+            }
+            else
+            {
+                throw new NotSupportedException();
+            }
         }
     }
 }