diff --git a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
index 44ab16d300..9e3c89b6a4 100644
--- a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
+++ b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
@@ -353,21 +353,6 @@ QT_USE_NAMESPACE
         [reflectionDelegate applicationDidBecomeActive:notification];
 
     QWindowSystemInterface::handleApplicationStateChanged(Qt::ApplicationActive);
-/*
-    onApplicationChangedActivation(true);
-
-    if (!QWidget::mouseGrabber()){
-        // Update enter/leave immidiatly, don't wait for a move event. But only
-        // if no grab exists (even if the grab points to this widget, it seems, ref X11)
-        QPoint qlocal, qglobal;
-        QWidget *widgetUnderMouse = 0;
-        qt_mac_getTargetForMouseEvent(0, QEvent::Enter, qlocal, qglobal, 0, &widgetUnderMouse);
-        QApplicationPrivate::dispatchEnterLeave(widgetUnderMouse, 0);
-        qt_last_mouse_receiver = widgetUnderMouse;
-        qt_last_native_mouse_receiver = widgetUnderMouse ?
-            (widgetUnderMouse->internalWinId() ? widgetUnderMouse : widgetUnderMouse->nativeParentWidget()) : 0;
-    }
-*/
 }
 
 - (void)applicationDidResignActive:(NSNotification *)notification
@@ -377,15 +362,6 @@ QT_USE_NAMESPACE
         [reflectionDelegate applicationDidResignActive:notification];
 
     QWindowSystemInterface::handleApplicationStateChanged(Qt::ApplicationInactive);
-/*
-    onApplicationChangedActivation(false);
-
-    if (!QWidget::mouseGrabber())
-        QApplicationPrivate::dispatchEnterLeave(0, qt_last_mouse_receiver);
-    qt_last_mouse_receiver = 0;
-    qt_last_native_mouse_receiver = 0;
-    qt_button_down = 0;
-*/
 }
 
 - (BOOL)applicationShouldHandleReopen:(NSApplication *)theApplication hasVisibleWindows:(BOOL)flag