Remove things specific to the old Macintosh, and spell "Mac OS X" consistently.
diff --git a/Doc/library/webbrowser.rst b/Doc/library/webbrowser.rst
index c243f7c..13cd8c7 100644
--- a/Doc/library/webbrowser.rst
+++ b/Doc/library/webbrowser.rst
@@ -151,10 +151,10 @@
    Only on Windows platforms.
 
 (3)
-   Only on MacOS platforms; requires the standard MacPython :mod:`ic` module.
+   Only on Mac OS platforms; requires the standard MacPython :mod:`ic` module.
 
 (4)
-   Only on MacOS X platform.
+   Only on Mac OS X platform.
 
 Here are some simple examples::