--- old/src/java.desktop/macosx/classes/sun/lwawt/macosx/CWarningWindow.java	2019-06-14 14:37:38.000000000 +0530
+++ new/src/java.desktop/macosx/classes/sun/lwawt/macosx/CWarningWindow.java	2019-06-14 14:37:38.000000000 +0530
@@ -29,6 +29,7 @@
 import sun.awt.IconInfo;
 import sun.java2d.SunGraphics2D;
 import sun.java2d.SurfaceData;
+import sun.java2d.metal.MTLLayer;
 import sun.java2d.opengl.CGLLayer;
 import sun.lwawt.LWWindowPeer;
 import sun.lwawt.PlatformEventNotifier;
@@ -222,8 +223,8 @@
                     owner.execute(ownerPtr -> {
                         execute(ptr -> {
                             CWrapper.NSWindow.orderWindow(ptr,
-                                                          CWrapper.NSWindow.NSWindowAbove,
-                                                          ownerPtr);
+                                    CWrapper.NSWindow.NSWindowAbove,
+                                    ownerPtr);
                         });
                     });
 
@@ -300,6 +301,23 @@
                     }
                 };
             }
+            public MTLLayer createMTLLayer() {
+                return new MTLLayer(null) {
+                    public Rectangle getBounds() {
+                        return CWarningWindow.this.getBounds();
+                    }
+
+                    public GraphicsConfiguration getGraphicsConfiguration() {
+                        LWWindowPeer peer = ownerPeer.get();
+                        return peer.getGraphicsConfiguration();
+                    }
+
+                    public boolean isOpaque() {
+                        return false;
+                    }
+                };
+            }
+
         };
     }
 
@@ -349,7 +367,7 @@
                 currentSize = newSize;
                 IconInfo ico = getSecurityIconInfo(currentSize, 0);
                 AWTAccessor.getWindowAccessor().setSecurityWarningSize(
-                    ownerWindow, ico.getWidth(), ico.getHeight());
+                        ownerWindow, ico.getWidth(), ico.getHeight());
             }
         }
     }
@@ -361,7 +379,7 @@
         }
 
         return new SunGraphics2D(sd, SystemColor.windowText, SystemColor.window,
-                                 ownerWindow.getFont());
+                ownerWindow.getFont());
     }