Replace "OS X" with "macOS" (#104653)

diff --git a/Doc/using/mac.rst b/Doc/using/mac.rst
index 69cd5c92d884d010b30a72344f572df52f687453..651782728621683b4054d223a022c298eddab3ff 100644 (file)
--- a/Doc/using/mac.rst
+++ b/Doc/using/mac.rst
@@ -144,8 +144,8 @@ the foundation of most modern Mac development. Information on PyObjC is
 available from https://pypi.org/project/pyobjc/.
 
 The standard Python GUI toolkit is :mod:`tkinter`, based on the cross-platform
-Tk toolkit (https://www.tcl.tk). An Aqua-native version of Tk is bundled with OS
-X by Apple, and the latest version can be downloaded and installed from
+Tk toolkit (https://www.tcl.tk). An Aqua-native version of Tk is bundled with
+macOS by Apple, and the latest version can be downloaded and installed from
 https://www.activestate.com; it can also be built from source.
 
 *wxPython* is another popular cross-platform GUI toolkit that runs natively on