diff --git a/xpinstall/wizard/mac/macbuild/mozInstallerPrefix.h b/xpinstall/wizard/mac/macbuild/mozInstallerPrefix.h
new file mode 100644
index 000000000000..792d43aac060
--- /dev/null
+++ b/xpinstall/wizard/mac/macbuild/mozInstallerPrefix.h
@@ -0,0 +1,25 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/ 
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
+ * for the specific language governing rights and limitations under the 
+ * License. 
+ * 
+ * The Original Code is Mozilla Communicator client code, released March
+ * 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation. Portions created by Netscape are Copyright (C) 1999
+ * Netscape Communications Corporation. All Rights Reserved.  
+ * 
+ * Contributors:
+ *     Samir Gehani <sgehani@netscape.com>
+ */
+ 
+#include <MacHeaders.h>
+
+#define	MOZILLA 1
\ No newline at end of file
diff --git a/xpinstall/wizard/mac/macbuild/mozInstallerPrefix_debug.h b/xpinstall/wizard/mac/macbuild/mozInstallerPrefix_debug.h
new file mode 100644
index 000000000000..24a0eef6a114
--- /dev/null
+++ b/xpinstall/wizard/mac/macbuild/mozInstallerPrefix_debug.h
@@ -0,0 +1,26 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/ 
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
+ * for the specific language governing rights and limitations under the 
+ * License. 
+ * 
+ * The Original Code is Mozilla Communicator client code, released March
+ * 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation. Portions created by Netscape are Copyright (C) 1999
+ * Netscape Communications Corporation. All Rights Reserved.  
+ * 
+ * Contributors:
+ *     Samir Gehani <sgehani@netscape.com>
+ */
+ 
+#include <MacHeaders.h>
+
+#define MIW_DEBUG 1
+#define MOZILLA 1
\ No newline at end of file
diff --git a/xpinstall/wizard/mac/macbuild/nsInstallerPrefix.h b/xpinstall/wizard/mac/macbuild/nsInstallerPrefix.h
new file mode 100644
index 000000000000..54495b9ecbbc
--- /dev/null
+++ b/xpinstall/wizard/mac/macbuild/nsInstallerPrefix.h
@@ -0,0 +1,25 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/ 
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
+ * for the specific language governing rights and limitations under the 
+ * License. 
+ * 
+ * The Original Code is Mozilla Communicator client code, released March
+ * 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation. Portions created by Netscape are Copyright (C) 1999
+ * Netscape Communications Corporation. All Rights Reserved.  
+ * 
+ * Contributors:
+ *     Samir Gehani <sgehani@netscape.com>
+ */
+ 
+#include <MacHeaders.h>
+
+#define MOZILLA 0
\ No newline at end of file
diff --git a/xpinstall/wizard/mac/macbuild/nsInstallerPrefix_debug.h b/xpinstall/wizard/mac/macbuild/nsInstallerPrefix_debug.h
new file mode 100644
index 000000000000..0733590ff237
--- /dev/null
+++ b/xpinstall/wizard/mac/macbuild/nsInstallerPrefix_debug.h
@@ -0,0 +1,26 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/ 
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
+ * for the specific language governing rights and limitations under the 
+ * License. 
+ * 
+ * The Original Code is Mozilla Communicator client code, released March
+ * 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation. Portions created by Netscape are Copyright (C) 1999
+ * Netscape Communications Corporation. All Rights Reserved.  
+ * 
+ * Contributors:
+ *     Samir Gehani <sgehani@netscape.com>
+ */
+ 
+#include <MacHeaders.h>
+
+#define MIW_DEBUG 1
+#define MOZILLA 0
\ No newline at end of file