diff --git a/themes/classic/editor/mac/editor.css b/themes/classic/editor/mac/editor.css
index 52b27fd3eea..41298b37fe8 100644
--- a/themes/classic/editor/mac/editor.css
+++ b/themes/classic/editor/mac/editor.css
@@ -42,14 +42,12 @@
 
 #appcontent
   {
-    border-left           : 1px solid #9D9D9D;
     border-top            : 1px solid #000000;
     border-right          : 1px solid #FFFFFF;
   }
 
 #ContentWindowDeck
   {
-    border-left           : 1px solid #000000;
     border-right          : 1px solid #DDDDDD;
   }
 
@@ -62,7 +60,6 @@
 
 #EditModeToolbar 
   {
-    border-left           : 1px solid #000000;
     border-right          : 1px solid #DDDDDD;
     border-bottom         : 1px solid #DDDDDD !important;
   }
diff --git a/themes/classic/global/mac/global.css b/themes/classic/global/mac/global.css
index 5a26c626403..a5c52e3b82e 100644
--- a/themes/classic/global/mac/global.css
+++ b/themes/classic/global/mac/global.css
@@ -119,7 +119,6 @@
       background-color    : #DDDDDD;
       overflow            : hidden;
       border-right        : 1px solid #FFFFFF;
-      border-left         : 1px solid #9D9D9D;
       border-bottom       : 1px solid #FFFFFF;
       /* DON'T DELETE.  Removes disappearance of scrollbars
        * in content pane when window is made smaller.
diff --git a/themes/classic/global/mac/splitter.css b/themes/classic/global/mac/splitter.css
index 155c2389f8c..e37455d82ac 100644
--- a/themes/classic/global/mac/splitter.css
+++ b/themes/classic/global/mac/splitter.css
@@ -6,6 +6,7 @@ splitter
     background-color      : #DDDDDD;
     vertical-align		  : middle;
     text-align			  : center;
+    border-right          : 1px solid #000000;
   }
 
 grippy, grippy[collapse="before"]
@@ -66,6 +67,7 @@ splitter:hover:active
       cursor              : n-resize;
       border-right		  : 0px;
       border-top		  : 2px groove #000000;
+      /* border-bottom       : 1px solid #000000; */
     }
 
 /**** NOTE *****/
diff --git a/themes/classic/navigator/mac/navigator.css b/themes/classic/navigator/mac/navigator.css
index bb88ee10e6b..671ca04e3c9 100644
--- a/themes/classic/navigator/mac/navigator.css
+++ b/themes/classic/navigator/mac/navigator.css
@@ -7,13 +7,12 @@
 
 #content
   {
-    border-left           : 1px solid #000000;
-    border-bottom         : 1px solid #000000;
+    border-bottom         : 1px solid #000000; 
   }
 
 #browser
   {
-    border-left           : 1px solid #9D9D9D;
+  /** placeholder style ***/
   }