--- old/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-04-01 16:36:40.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-04-01 16:36:39.000000000 +0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -114,6 +114,8 @@
 
     static final int RESIZABLE = 1 << 9; // both a style bit and prop bit
     static final int NONACTIVATING = 1 << 24;
+    static final int IS_DIALOG = 1 << 25;
+    static final int IS_MODAL = 1 << 26;
 
     static final int _STYLE_PROP_BITMASK = DECORATED | TEXTURED | UNIFIED | UTILITY | HUD | SHEET | CLOSEABLE | MINIMIZABLE | RESIZABLE;
 
@@ -373,6 +375,13 @@
             }
         }
 
+        if (isDialog) {
+            styleBits = SET(styleBits, IS_DIALOG, true);
+            if (((Dialog) target).isModal()) {
+                styleBits = SET(styleBits, IS_MODAL, true);
+            }
+        }
+
         peer.setTextured(IS(TEXTURED, styleBits));
 
         return styleBits;
--- old/src/macosx/native/sun/awt/AWTWindow.m	2013-04-01 16:36:41.000000000 +0400
+++ new/src/macosx/native/sun/awt/AWTWindow.m	2013-04-01 16:36:41.000000000 +0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -536,8 +536,12 @@
 - (void) windowDidBecomeKey: (NSNotification *) notification {
 AWT_ASSERT_APPKIT_THREAD;
     [AWTToolkit eventCountPlusPlus];
-    [CMenuBar activate:self.javaMenuBar modallyDisabled:NO];
     AWTWindow *opposite = [AWTWindow lastKeyWindow];
+    if (!IS(self.styleBits, IS_DIALOG)) {
+        [CMenuBar activate:self.javaMenuBar modallyDisabled:NO];
+    } else if (IS(self.styleBits, IS_MODAL)) {
+        [CMenuBar activate:opposite->javaMenuBar modallyDisabled:YES];        
+    }
     [AWTWindow setLastKeyWindow:nil];
 
     [self _deliverWindowFocusEvent:YES oppositeWindow: opposite];