Add OSX classifier in setup.py

Author: softwareengineerprogrammer

setup.py

@@ -36,6 +36,7 @@ def read(*names, **kwargs):
         'Operating System :: Unix',
         'Operating System :: POSIX',
         'Operating System :: Microsoft :: Windows',
+        'Operating System :: MacOS :: MacOS X',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3 :: Only',