diff --git a/Mac/Modules/ColorPickermodule.c b/Mac/Modules/ColorPickermodule.c
index 62b4d5f..c29e0a4 100644
--- a/Mac/Modules/ColorPickermodule.c
+++ b/Mac/Modules/ColorPickermodule.c
@@ -64,6 +64,9 @@
 void initColorPicker(void)
 {
 	PyObject *m;
+	
+	if (PyErr_WarnPy3k("In 3.x, ColorPicker is removed.", 1) < 0)
+		return;
 
 	/* Create the module and add the functions */
 	m = Py_InitModule4("ColorPicker", cp_methods,
diff --git a/Mac/Modules/MacOS.c b/Mac/Modules/MacOS.c
index 3fe6e0d..becb4b1 100644
--- a/Mac/Modules/MacOS.c
+++ b/Mac/Modules/MacOS.c
@@ -603,6 +603,9 @@
 {
 	PyObject *m, *d;
 	
+	if (PyErr_WarnPy3k("In 3.x, MacOS is removed.", 1))
+		return;
+	
 	m = Py_InitModule("MacOS", MacOS_Methods);
 	d = PyModule_GetDict(m);
 	
diff --git a/Mac/Modules/Nav.c b/Mac/Modules/Nav.c
index 6786ea0..3d3914f 100644
--- a/Mac/Modules/Nav.c
+++ b/Mac/Modules/Nav.c
@@ -916,6 +916,9 @@
 initNav(void)
 {
 	PyObject *m, *d;
+	
+	if (PyErr_WarnPy3k("In 3.x, Nav is removed.", 1))
+		return;
 
 	/* Test that we have NavServices */
 	if ( !NavServicesAvailable() ) {
diff --git a/Mac/Modules/OSATerminology.c b/Mac/Modules/OSATerminology.c
index 85ad425..66fb969 100644
--- a/Mac/Modules/OSATerminology.c
+++ b/Mac/Modules/OSATerminology.c
@@ -89,5 +89,7 @@
 void
 initOSATerminology(void)
 {
+	if (PyErr_WarnPy3k("In 3.x, OSATerminology is removed.", 1) < 0)
+		return;
 	Py_InitModule("OSATerminology", OSATerminology_methods);
 }
\ No newline at end of file
diff --git a/Mac/Modules/autoGIL.c b/Mac/Modules/autoGIL.c
index 3108816..af2e699 100644
--- a/Mac/Modules/autoGIL.c
+++ b/Mac/Modules/autoGIL.c
@@ -134,6 +134,9 @@
 {
 	PyObject *mod;
 
+	if (PyErr_WarnPy3k("In 3.x, the autoGIL module is removed.", 1) < 0)
+		return;
+
 	mod = Py_InitModule4("autoGIL", autoGIL_methods, autoGIL_docs,
 			     NULL, PYTHON_API_VERSION);
 	if (mod == NULL)
diff --git a/Mac/Modules/icgluemodule.c b/Mac/Modules/icgluemodule.c
index fa50f0d..d995f16 100644
--- a/Mac/Modules/icgluemodule.c
+++ b/Mac/Modules/icgluemodule.c
@@ -453,6 +453,9 @@
 initicglue(void)
 {
 	PyObject *m, *d;
+	
+	if (PyErr_WarnPy3k("In 3.x, icglue is removed.", 1))
+		return;
 
 	/* Create the module and add the functions */
 	m = Py_InitModule4("icglue", ic_methods,