diff -r a926ecef7eb3 -r fd98305f0d19 jdk/src/macosx/classes/sun/lwawt/LWToolkit.java
--- a/jdk/src/macosx/classes/sun/lwawt/LWToolkit.java	Thu Jan 16 17:49:40 2014 +0100
+++ b/jdk/src/macosx/classes/sun/lwawt/LWToolkit.java	Wed Jan 15 11:53:54 2014 +0400
@@ -35,6 +35,7 @@
 
 import sun.awt.*;
 import sun.print.*;
+import sun.misc.ThreadGroupUtils;
 
 import static sun.lwawt.LWWindowPeer.PeerType;
 
@@ -70,30 +71,17 @@
     protected final void init() {
         AWTAutoShutdown.notifyToolkitThreadBusy();
 
-        ThreadGroup mainTG = AccessController.doPrivileged(
-            new PrivilegedAction<ThreadGroup>() {
-                public ThreadGroup run() {
-                    ThreadGroup currentTG = Thread.currentThread().getThreadGroup();
-                    ThreadGroup parentTG = currentTG.getParent();
-                    while (parentTG != null) {
-                        currentTG = parentTG;
-                        parentTG = currentTG.getParent();
-                    }
-                    return currentTG;
-                }
-            }
-        );
+        ThreadGroup rootTG = AccessController.doPrivileged(
+                (PrivilegedAction<ThreadGroup>) ThreadGroupUtils::getRootThreadGroup);
 
         Runtime.getRuntime().addShutdownHook(
-            new Thread(mainTG, new Runnable() {
-                public void run() {
-                    shutdown();
-                    waitForRunState(STATE_CLEANUP);
-                }
+            new Thread(rootTG, () -> {
+                shutdown();
+                waitForRunState(STATE_CLEANUP);
             })
         );
 
-        Thread toolkitThread = new Thread(mainTG, this, "AWT-LW");
+        Thread toolkitThread = new Thread(rootTG, this, "AWT-LW");
         toolkitThread.setDaemon(true);
         toolkitThread.setPriority(Thread.NORM_PRIORITY + 1);
         toolkitThread.start();