diff --git a/include/wx/mac/carbon/pen.h b/include/wx/mac/carbon/pen.h
index ff6f65f12c..4c07343d22 100644
--- a/include/wx/mac/carbon/pen.h
+++ b/include/wx/mac/carbon/pen.h
@@ -76,7 +76,7 @@ public:
     return m_refData ? penData && *M_PENDATA == *penData : !penData;
   }
 
-  inline bool operator != (const wxPen& pen) const { return *(this == pen); }
+  inline bool operator != (const wxPen& pen) const { return !(*this == pen); }
 
   virtual bool Ok() const { return IsOk(); }
   virtual bool IsOk() const { return (m_refData != NULL) ; }
diff --git a/src/mac/carbon/brush.cpp b/src/mac/carbon/brush.cpp
index c9dcbde97c..b0fa74aa0a 100644
--- a/src/mac/carbon/brush.cpp
+++ b/src/mac/carbon/brush.cpp
@@ -33,12 +33,12 @@ public:
     bool operator == ( const wxBrushRefData& brush ) const
     {
         return m_style == brush.m_style &&
-                m_stipple.IsRefTo(&data.m_stipple) &&
+                m_stipple.IsRefTo(&brush.m_stipple) &&
                 m_colour == brush.m_colour &&
                 m_macBrushKind == brush.m_macBrushKind &&
                 m_macThemeBrush == brush.m_macThemeBrush &&
                 m_macThemeBackground == brush.m_macThemeBackground &&
-                m_macThemeBackgroundExtent == brush.m_macThemeBackgroundExtent;
+                EqualRect(&m_macThemeBackgroundExtent, &brush.m_macThemeBackgroundExtent);
     }
 
 
diff --git a/src/mac/carbon/window.cpp b/src/mac/carbon/window.cpp
index 3183451f17..719f9376d0 100644
--- a/src/mac/carbon/window.cpp
+++ b/src/mac/carbon/window.cpp
@@ -1661,10 +1661,10 @@ void wxWindowMac::DoGetClientSize( int *x, int *y ) const
 
 bool wxWindowMac::SetCursor(const wxCursor& cursor)
 {
-    if (m_cursor == cursor)
+    if (m_cursor.IsRefTo(&cursor))
         return false;
 
-    if (wxNullCursor == cursor)
+    if (!cursor.IsOk())
     {
         if ( ! wxWindowBase::SetCursor( *wxSTANDARD_CURSOR ) )
             return false ;
@@ -2692,7 +2692,7 @@ void wxWindowMac::OnSetFocus( wxFocusEvent& event )
         Rect rect ;
 
         m_peer->GetRect( &rect ) ;
-        // auf den umgebenden Rahmen zurŸck
+        // auf den umgebenden Rahmen zurĀŸck
         InsetRect( &rect, -1 , -1 ) ;
 
         wxTopLevelWindowMac* top = MacGetTopLevelWindow();