Fix doc reference to OS X 10.9 Mavericks.
diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index a246e8c..f74b557 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -294,7 +294,7 @@
.. note::
- On Mac OS X older than Maverick (10.9), :class:`selectors.KqueueSelector`
+ On Mac OS X older than 10.9 (Mavericks), :class:`selectors.KqueueSelector`
does not support character devices like PTY, whereas it is used by the
default event loop. The :class:`SelectorEventLoop` can be used with
:class:`SelectSelector` to handle character devices.