Normalize spelling of Mac OS X.
diff --git a/Doc/distutils/apiref.rst b/Doc/distutils/apiref.rst
index e3608fb..a3b464a 100644
--- a/Doc/distutils/apiref.rst
+++ b/Doc/distutils/apiref.rst
@@ -1091,17 +1091,17 @@
For non-POSIX platforms, currently just returns ``sys.platform``.
- For MacOS X systems the OS version reflects the minimal version on which
+ For Mac OS X systems the OS version reflects the minimal version on which
binaries will run (that is, the value of ``MACOSX_DEPLOYMENT_TARGET``
during the build of Python), not the OS version of the current system.
- For universal binary builds on MacOS X the architecture value reflects
+ For universal binary builds on Mac OS X the architecture value reflects
the univeral binary status instead of the architecture of the current
processor. For 32-bit universal binaries the architecture is ``fat``,
for 64-bit universal binaries the architecture is ``fat64``, and
for 4-way universal binaries the architecture is ``universal``.
- Examples of returned values on MacOS X:
+ Examples of returned values on Mac OS X:
* ``macosx-10.3-ppc``