src/java.desktop/share/classes/javax/swing/JMenuBar.java

@@ -35,14 +35,19 @@
 
 import java.io.Serializable;
 import java.io.ObjectOutputStream;
 import java.io.ObjectInputStream;
 import java.io.IOException;
+import java.lang.reflect.Method;
 
 import javax.swing.plaf.*;
 import javax.accessibility.*;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import sun.awt.OSInfo;
+
 /**
  * An implementation of a menu bar. You add <code>JMenu</code> objects to the
  * menu bar to construct a menu. When the user selects a <code>JMenu</code>
  * object, its associated <code>JPopupMenu</code> is displayed, allowing the
  * user to select one of the <code>JMenuItems</code> on it.

@@ -104,10 +109,40 @@
     /* diagnostic aids -- should be false for production builds. */
     private static final boolean TRACE =   false; // trace creates and disposes
     private static final boolean VERBOSE = false; // show reuse hits/misses
     private static final boolean DEBUG =   false;  // show bad params, misc.
 
+    private static boolean disableAquaMenuBarUI = true;            
+    
+
+    static {
+        AccessController
+            .doPrivileged((PrivilegedAction<Void>) () -> {
+                if (OSInfo.getOSType() == OSInfo.OSType.MACOSX
+                        && !Boolean.getBoolean("apple.laf.disableForcedScreenMenuBar")) {
+                    System.loadLibrary("osxui");
+                    disableAquaMenuBarUI = false;
+                }
+                return null;
+            });
+    }
+
+    
+    private static boolean getScreenMenuBarProperty() {
+        try {
+            Class<?> cls = Class.forName("com.apple.laf.AquaMenuBarUI");
+            Method m = cls.getDeclaredMethod("getScreenMenuBarProperty");
+            m.setAccessible(true);
+
+            return ((boolean) m.invoke(null));
+        } catch (Exception ignored) {}
+
+        return false;
+    }
+
+
+
     /**
      * Creates a new menu bar.
      */
     public JMenuBar() {
         super();

@@ -142,10 +177,17 @@
      * Resets the UI property with a value from the current look and feel.
      *
      * @see JComponent#updateUI
      */
     public void updateUI() {
+        if (!disableAquaMenuBarUI) {
+            if (getScreenMenuBarProperty())  {
+                UIManager.put("MenuBarUI", "com.apple.laf.AquaMenuBarUI");
+            } else {
+                UIManager.put("MenuBarUI", null);
+            }
+        }
         setUI((MenuBarUI)UIManager.getUI(this));
     }
 
 
     /**