diff --git a/setup.cfg b/setup.cfg
index d12ce15..7b9ad63 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,6 +10,8 @@ classifiers =
 	Topic :: System
 	Topic :: Utilities
 	License :: OSI Approved :: MIT License
+	Operating System :: MacOS :: MacOS 9
+	Operating System :: MacOS :: MacOS X
 	Operating System :: OS Independent
 	Programming Language :: Python
 	Programming Language :: Python :: 3