diff --git a/Doc/library/os.path.rst b/Doc/library/os.path.rst
index dd67a7c..bc2220d 100644
--- a/Doc/library/os.path.rst
+++ b/Doc/library/os.path.rst
@@ -190,7 +190,7 @@
 
 .. function:: normcase(path)
 
-   Normalize the case of a pathname.  On Unix, this returns the path unchanged; on
+   Normalize the case of a pathname.  On Unix and MacOSX, this returns the path unchanged; on
    case-insensitive filesystems, it converts the path to lowercase.  On Windows, it
    also converts forward slashes to backward slashes.