diff --git a/build/mac/BuildNGLayout.pl b/build/mac/BuildNGLayout.pl
index fd949b28f409..8d573dd82e7f 100644
--- a/build/mac/BuildNGLayout.pl
+++ b/build/mac/BuildNGLayout.pl
@@ -53,9 +53,10 @@ $build{common} 			= 0;
 $build{intl} 			= 0;
 $build{nglayout} 		= 0;
 $build{editor} 			= 0;
-$build{mailnews} 		= 0;
 $build{viewer} 			= 0;
 $build{xpapp} 			= 0;
+$build{mailnews} 		= 0;
+$build{apprunner}		= 0;
 
 #-----------------------------------------------
 # configuration variables that affect the manner
@@ -109,9 +110,10 @@ if ($build{most})
 #   $build{intl}		= 1; 
 #	$build{nglayout}	= 1;
 #	$build{editor}		= 1;
-#	$build{mailnews}	= 1;
 #	$build{viewer}		= 1;
-	$build{xpapp}		= 1;
+#	$build{xpapp}		= 1;
+#	$build{mailnews}	= 1;
+	$build{apprunner}	= 1;
 }
 
 # do the work
diff --git a/build/mac/BuildNGLayoutDebug.pl b/build/mac/BuildNGLayoutDebug.pl
index 2370cf58289b..b062ed6edd63 100644
--- a/build/mac/BuildNGLayoutDebug.pl
+++ b/build/mac/BuildNGLayoutDebug.pl
@@ -53,9 +53,10 @@ $build{common} 			= 0;
 $build{intl} 			= 0;
 $build{nglayout} 		= 0;
 $build{editor} 			= 0;
-$build{mailnews} 		= 0;
 $build{viewer} 			= 0;
 $build{xpapp} 			= 0;
+$build{mailnews} 		= 0;
+$build{apprunner} 		= 0;
 
 #-----------------------------------------------
 # configuration variables that affect the manner
@@ -110,9 +111,10 @@ if ($build{most})
 	$build{intl}		= 1; 
 	$build{nglayout}	= 1;
 	$build{editor}		= 1;
-	$build{mailnews}	= 1;
 	$build{viewer}		= 1;
 	$build{xpapp}		= 1;
+	$build{mailnews}	= 1;
+	$build{apprunner} 	= 1;
 }
 
 # do the work
diff --git a/build/mac/TinderboxNGLayout.pl b/build/mac/TinderboxNGLayout.pl
index 7dad6a7c5155..afb61a932006 100644
--- a/build/mac/TinderboxNGLayout.pl
+++ b/build/mac/TinderboxNGLayout.pl
@@ -56,9 +56,10 @@ $build{common} 			= 0;
 $build{intl} 			= 0;
 $build{nglayout} 		= 0;
 $build{editor} 			= 0;
-$build{mailnews} 		= 0;
 $build{viewer} 			= 0;
 $build{xpapp} 			= 0;
+$build{mailnews} 		= 0;
+$build{apprunner} 		= 0;
 
 
 # script
diff --git a/build/mac/TinderboxNGLayoutOpt.pl b/build/mac/TinderboxNGLayoutOpt.pl
index 122cc84ec708..7252b63bb461 100644
--- a/build/mac/TinderboxNGLayoutOpt.pl
+++ b/build/mac/TinderboxNGLayoutOpt.pl
@@ -56,9 +56,10 @@ $build{common} 			= 0;
 $build{intl} 			= 0;
 $build{nglayout} 		= 0;
 $build{editor} 			= 0;
-$build{mailnews} 		= 0;
 $build{viewer} 			= 0;
 $build{xpapp} 			= 0;
+$build{mailnews} 		= 0;
+$build{apprunner} 		= 0;
 
 # script