--- a/gdk/quartz/gdkwindow-quartz.c
+++ b/gdk/quartz/gdkwindow-quartz.c
@@ -1213,6 +1213,15 @@ gdk_window_quartz_show (GdkWindow *window, gboolean already_mapped)
   if (impl->transient_for && !GDK_WINDOW_DESTROYED (impl->transient_for))
     _gdk_quartz_window_attach_to_parent (window);

+  if (NSPointInRect ([[impl->view window] convertScreenToBase:[NSEvent mouseLocation]], [impl->view bounds]))
+    {
+      /* When a new window (and thus view) has been created, and the mouse
+       * is in the window area, we will not receive an NSMouseEntered
+       * event.  Therefore, we synthesize an enter notify event manually.
+       */
+      _gdk_quartz_events_send_enter_notify_event (window);
+    }
+
   GDK_QUARTZ_RELEASE_POOL;
 }