diff --git a/Doc/mac/libctb.tex b/Doc/mac/libctb.tex
index 2cb2b03..9950a41 100644
--- a/Doc/mac/libctb.tex
+++ b/Doc/mac/libctb.tex
@@ -9,7 +9,10 @@
 
 This module provides a partial interface to the Macintosh
 Communications Toolbox. Currently, only Connection Manager tools are
-supported.  It may not be available in all Mac Python versions.
+supported.
+
+This module is only available under MacOS9 or earlier, in classic PPC
+MacPython.
 \index{Communications Toolbox, Macintosh}
 \index{Macintosh Communications Toolbox}
 \index{Connection Manager}
diff --git a/Doc/mac/libmacspeech.tex b/Doc/mac/libmacspeech.tex
index 413b875..2022178 100644
--- a/Doc/mac/libmacspeech.tex
+++ b/Doc/mac/libmacspeech.tex
@@ -12,8 +12,10 @@
 allowing you to let the Macintosh utter phrases. You need a version of
 the Speech Manager extension (version 1 and 2 have been tested) in
 your \file{Extensions} folder for this to work. The module does not
-provide full access to all features of the Speech Manager yet.  It may
-not be available in all Mac Python versions.
+provide full access to all features of the Speech Manager.
+
+This module is only available on MacOS9 and earlier in classic PPC
+MacPython.
 
 \begin{funcdesc}{Available}{}
 Test availability of the Speech Manager extension (and, on the