Index: /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIManagerDialog.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIManagerDialog.cpp	(revision 75987)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIManagerDialog.cpp	(revision 75988)
@@ -188,7 +188,9 @@
 #ifdef VBOX_WS_MAC
     /* Prepare 'Window' menu: */
-    AssertPtrReturnVoid(gpWindowMenuManager);
-    menuBar()->addMenu(gpWindowMenuManager->createMenu(this));
-    gpWindowMenuManager->addWindow(this);
+    if (gpWindowMenuManager)
+    {
+        menuBar()->addMenu(gpWindowMenuManager->createMenu(this));
+        gpWindowMenuManager->addWindow(this);
+    }
 #endif
 }
@@ -209,7 +211,9 @@
 #ifdef VBOX_WS_MAC
     /* Cleanup 'Window' menu: */
-    AssertPtrReturnVoid(gpWindowMenuManager);
-    gpWindowMenuManager->removeWindow(this);
-    gpWindowMenuManager->destroyMenu(this);
+    if (gpWindowMenuManager)
+    {
+        gpWindowMenuManager->removeWindow(this);
+        gpWindowMenuManager->destroyMenu(this);
+    }
 #endif
 }