diff --git a/desktop/source/app/app.cxx b/desktop/source/app/app.cxx
index a3b3ceb..7a572d8 100644
--- a/desktop/source/app/app.cxx
+++ b/desktop/source/app/app.cxx
@@ -50,6 +50,7 @@
 #include "migration.hxx"
 
 #include <svtools/javacontext.hxx>
+#include <com/sun/star/frame/XLayoutManager.hpp>
 #include <com/sun/star/frame/XSessionManagerListener.hpp>
 #include <com/sun/star/frame/XSynchronousDispatch.hpp>
 #include <com/sun/star/document/CorruptedFilterConfigurationException.hpp>
@@ -139,8 +140,10 @@
 #include <vcl/bitmap.hxx>
 #include <vcl/stdtext.hxx>
 #include <vcl/msgbox.hxx>
+#include <vcl/wrkwin.hxx>
 #include <sfx2/sfx.hrc>
 #include <sfx2/app.hxx>
+#include <sfx2/viewfrm.hxx>
 #include <svl/itemset.hxx>
 #include <svl/eitem.hxx>
 #include <ucbhelper/contentbroker.hxx>
@@ -3153,6 +3156,54 @@ void Desktop::HandleAppEvent( const ApplicationEvent& rAppEvent )
         if( pD )
             pD->doShutdown();
     }
+#ifdef MACOSX
+    else if( rAppEvent.GetEvent() == "TOGGLEFULLSCREEN" )
+    {
+        SfxViewFrame *pTop = SfxViewFrame::Current()->GetTopViewFrame();
+        if ( pTop )
+        {
+            WorkWindow* pWork = (WorkWindow*) pTop->GetFrame().GetSystemWindow();
+            if ( pWork )
+            {
+                com::sun::star::uno::Reference< com::sun::star::frame::XFrame > xFrame(
+                        SfxViewFrame::Current()->GetFrame().GetFrameInterface(),
+                        com::sun::star::uno::UNO_QUERY);
+
+                Reference< ::com::sun::star::beans::XPropertySet > xPropSet( xFrame, UNO_QUERY );
+                Reference< ::com::sun::star::frame::XLayoutManager > xLayoutManager;
+                if ( xPropSet.is() )
+                {
+                    try
+                    {
+                        Any aValue = xPropSet->getPropertyValue( rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "LayoutManager" )));
+                        aValue >>= xLayoutManager;
+                    }
+                    catch ( css::uno::Exception& )
+                    {
+                    }
+                }
+                sal_Bool bNewFullScreenMode = rAppEvent.GetData().EqualsAscii( "ENTER" );
+                if ( bNewFullScreenMode != !pWork->IsFullScreenMode() )
+                {
+                    Reference< ::com::sun::star::beans::XPropertySet > xLMPropSet( xLayoutManager, UNO_QUERY );
+                    if ( xLMPropSet.is() )
+                    {
+                        try
+                        {
+                            xLMPropSet->setPropertyValue(
+                                ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "HideCurrentUI" )),
+                                makeAny( bNewFullScreenMode ));
+                        }
+                        catch ( ::com::sun::star::beans::UnknownPropertyException& )
+                        {
+                        }
+                    }
+                    pWork->SetMenuBarMode( bNewFullScreenMode ? MENUBAR_MODE_HIDE : MENUBAR_MODE_NORMAL );
+                }
+            }
+        }
+    }
+#endif
 }
 
 void Desktop::OpenSplashScreen()