diff --git a/src/mac/carbon/frame.cpp b/src/mac/carbon/frame.cpp
index 16aee93377..9c06869fcb 100644
--- a/src/mac/carbon/frame.cpp
+++ b/src/mac/carbon/frame.cpp
@@ -230,7 +230,7 @@ void wxFrame::SetMenuBar(wxMenuBar *menuBar)
   
     m_frameMenuBar = NULL;
     m_frameMenuBar = menuBar;
-    m_frameMenuBar->MacInstallMenuBar() ;
+//    m_frameMenuBar->MacInstallMenuBar() ;
     m_frameMenuBar->Attach(this);
 }
 
@@ -283,9 +283,14 @@ void wxFrame::OnActivate(wxActivateEvent& event)
            )
         {
             child->SetFocus();
-            return;
+            break;
         }
     }
+    
+    if ( m_frameMenuBar != NULL )
+    {
+    	m_frameMenuBar->MacInstallMenuBar() ;
+    }
 }
 
 void wxFrame::DoGetClientSize(int *x, int *y) const
diff --git a/src/mac/carbon/menu.cpp b/src/mac/carbon/menu.cpp
index 9d308de120..621494b83d 100644
--- a/src/mac/carbon/menu.cpp
+++ b/src/mac/carbon/menu.cpp
@@ -631,6 +631,9 @@ void wxMenuBar::RebuildAccelTable()
 
 void wxMenuBar::MacInstallMenuBar() 
 {
+	if ( s_macInstalledMenuBar == this )
+		return ;
+		
   	Handle menubar = ::GetNewMBar( kwxMacMenuBarResource ) ;
   	wxString message ;
   	wxCHECK_RET( menubar != NULL, "can't read MBAR resource" );
diff --git a/src/mac/frame.cpp b/src/mac/frame.cpp
index 16aee93377..9c06869fcb 100644
--- a/src/mac/frame.cpp
+++ b/src/mac/frame.cpp
@@ -230,7 +230,7 @@ void wxFrame::SetMenuBar(wxMenuBar *menuBar)
   
     m_frameMenuBar = NULL;
     m_frameMenuBar = menuBar;
-    m_frameMenuBar->MacInstallMenuBar() ;
+//    m_frameMenuBar->MacInstallMenuBar() ;
     m_frameMenuBar->Attach(this);
 }
 
@@ -283,9 +283,14 @@ void wxFrame::OnActivate(wxActivateEvent& event)
            )
         {
             child->SetFocus();
-            return;
+            break;
         }
     }
+    
+    if ( m_frameMenuBar != NULL )
+    {
+    	m_frameMenuBar->MacInstallMenuBar() ;
+    }
 }
 
 void wxFrame::DoGetClientSize(int *x, int *y) const
diff --git a/src/mac/menu.cpp b/src/mac/menu.cpp
index 9d308de120..621494b83d 100644
--- a/src/mac/menu.cpp
+++ b/src/mac/menu.cpp
@@ -631,6 +631,9 @@ void wxMenuBar::RebuildAccelTable()
 
 void wxMenuBar::MacInstallMenuBar() 
 {
+	if ( s_macInstalledMenuBar == this )
+		return ;
+		
   	Handle menubar = ::GetNewMBar( kwxMacMenuBarResource ) ;
   	wxString message ;
   	wxCHECK_RET( menubar != NULL, "can't read MBAR resource" );