diff --git a/Mac/mwerks/mwerks_tkplugin_config.h b/Mac/mwerks/mwerks_tkplugin_config.h
new file mode 100644
index 00000000000..81cd9e8b313
--- /dev/null
+++ b/Mac/mwerks/mwerks_tkplugin_config.h
@@ -0,0 +1,4 @@
+#define HAVE_CONFIG_H
+#define USE_TK
+#define MAC_TCL
+#define USE_GUSI
diff --git a/Mac/mwerks/old/mwerks_shgusi_config.h b/Mac/mwerks/old/mwerks_shgusi_config.h
new file mode 100644
index 00000000000..e6fb8c9653f
--- /dev/null
+++ b/Mac/mwerks/old/mwerks_shgusi_config.h
@@ -0,0 +1,5 @@
+#define HAVE_CONFIG_H
+#define USE_MAC_SHARED_LIBRARY
+#define USE_MAC_DYNAMIC_LOADING
+#define USE_MAC_APPLET_SUPPORT
+#define USE_GUSI