diff --git a/widget/src/mac/nsNativeThemeMac.cpp b/widget/src/mac/nsNativeThemeMac.cpp
index 10acc7ef974..dc826ee8b66 100644
--- a/widget/src/mac/nsNativeThemeMac.cpp
+++ b/widget/src/mac/nsNativeThemeMac.cpp
@@ -514,7 +514,15 @@ void
 nsNativeThemeMac::DrawTabPanel ( const Rect& inBoxRect, PRBool inIsDisabled )
 {
   ThemeDrawState drawState = inIsDisabled ? kThemeStateActive : kThemeStateDisabled;
-  ::DrawThemeTabPane(&inBoxRect, kThemeStateActive);
+  ::DrawThemeTabPane(&inBoxRect, drawState);
+}
+
+
+void
+nsNativeThemeMac::DrawSeparator ( const Rect& inBoxRect, PRBool inIsDisabled )
+{
+  ThemeDrawState drawState = inIsDisabled ? kThemeStateActive : kThemeStateDisabled;
+  ::DrawThemeSeparator(&inBoxRect, drawState);
 }
 
 
@@ -705,6 +713,9 @@ nsNativeThemeMac::DrawWidgetBackground(nsIRenderingContext* aContext, nsIFrame*
       DrawButton ( kThemePushButton, macRect, IsDefaultButton(aFrame), IsDisabled(aFrame),
                     kThemeButtonOn, kThemeAdornmentNone, eventState );
       break;
+    case NS_THEME_TOOLBAR_SEPARATOR:
+      DrawSeparator ( macRect, IsDisabled(aFrame) );
+      break;
       
     case NS_THEME_TOOLBAR:
     case NS_THEME_TOOLBOX:
@@ -1093,6 +1104,7 @@ nsNativeThemeMac::ThemeSupportsWidget(nsIPresContext* aPresContext,
     case NS_THEME_PROGRESSBAR_VERTICAL:
     case NS_THEME_PROGRESSBAR_CHUNK:
     case NS_THEME_PROGRESSBAR_CHUNK_VERTICAL:
+    case NS_THEME_TOOLBAR_SEPARATOR:
     
     case NS_THEME_LISTBOX:
     
diff --git a/widget/src/mac/nsNativeThemeMac.h b/widget/src/mac/nsNativeThemeMac.h
index e642492510e..aa8cb629c1a 100644
--- a/widget/src/mac/nsNativeThemeMac.h
+++ b/widget/src/mac/nsNativeThemeMac.h
@@ -109,6 +109,7 @@ protected:
   void DrawTab ( const Rect& inBoxRect, PRBool inIsDisabled, PRBool inIsFrontmost, 
                   PRBool inIsHorizontal, PRBool inTabBottom, PRInt32 inState ) ;
   void DrawTabPanel ( const Rect& inBoxRect, PRBool inIsDisabled ) ;
+  void DrawSeparator ( const Rect& inBoxRect, PRBool inIsDisabled ) ;
 //  void DrawScrollArrows ( const Rect& inScrollbarRect, PRBool inIsDisabled, PRInt32 inWidget, PRInt32 inState ) ;
   
   void DrawButton ( ThemeButtonKind inKind, const Rect& inBoxRect, PRBool inIsDefault,