diff --git a/build/mac/BuildMozillaOfficialDebug.pl b/build/mac/BuildMozillaOfficialDebug.pl
new file mode 100644
index 000000000000..24b7524761f7
--- /dev/null
+++ b/build/mac/BuildMozillaOfficialDebug.pl
@@ -0,0 +1,46 @@
+#!perl
+
+#
+# The contents of this file are subject to the Netscape Public License
+# Version 1.0 (the "NPL"); you may not use this file except in
+# compliance with the NPL.  You may obtain a copy of the NPL at
+# http://www.mozilla.org/NPL/
+#
+# Software distributed under the NPL is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+# for the specific language governing rights and limitations under the
+# NPL.
+#
+# The Initial Developer of this code under the NPL is Netscape
+# Communications Corporation.  Portions created by Netscape are
+# Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+# Reserved.
+#
+
+	use Moz;
+	use BuildList;
+
+$DEBUG = 1;
+
+	# One of them should be 1. This will come from a config file at some stage.
+	# In the meanwhile, it should match mozilla/config/mac/MacConfig.h
+$MOZ_LITE   = 0;
+$MOZ_MEDIUM = 1;
+$MOZ_DARK   = 0;
+
+Moz::OpenErrorLog(":::Mozilla.BuildLog");
+Moz::StopForErrors();
+
+chdir("::::");
+
+# Make and popuplate the dist directory
+DistMozilla();
+
+# Set the build number in about-all.html.  Commented out for now
+# until ckid/mcvs resource problem is resolved.
+SetBuildNumber();
+
+SetAgentString();
+
+# Now build the projects
+BuildMozilla();