diff --git a/Mac/ReadMe b/Mac/ReadMe
index d270600..bf3cf8c 100644
--- a/Mac/ReadMe
+++ b/Mac/ReadMe
@@ -1,5 +1,5 @@
-How to install Python 1.5.1 on your Macintosh
----------------------------------------------
+How to install Python 1.5.2b1 on your Macintosh
+-----------------------------------------------
 
 If this is your first encounter with Python: you definitely need the
 common user documentation (common to all platforms). You can find this
@@ -99,8 +99,8 @@
 ------------
 
 Two items are installed in the system folder: the interpreter shared
-library "PythonCore 1.5.1" lives in the Extensions folder and the
-"Python 1.5.1 Preferences" file in the Preferences folder. All the rest
+library "PythonCore 1.5.2b1" lives in the Extensions folder and the
+"Python 1.5.2b1 Preferences" file in the Preferences folder. All the rest
 of Python lives in the folder you installed in.
 
 Things to see
@@ -136,9 +136,9 @@
 whether to upgrade. The bad news is that your old preference settings
 are lost and you have to set them again.
 
-After you are satisfied that 1.5.1 works as expected you can trash
+After you are satisfied that 1.5.2b1 works as expected you can trash
 anything in the system folder that has "python" in the name and not
-"1.5.1".
+"1.5.2b1".
 
 The installer
 -------------
diff --git a/Mac/_checkversion.py b/Mac/_checkversion.py
index 6dffa2d..ee01857 100644
--- a/Mac/_checkversion.py
+++ b/Mac/_checkversion.py
@@ -5,7 +5,7 @@
 import pyversioncheck
 
 _PACKAGE="MacPython"
-_VERSION="1.5.1"
+_VERSION="1.5.2b1"
 _URL="http://www.cwi.nl/~jack/macpythonversion.txt"
 
 try: