diff --git a/varken/tautulli.py b/varken/tautulli.py
index 209d7f5..c0d11a2 100644
--- a/varken/tautulli.py
+++ b/varken/tautulli.py
@@ -122,7 +122,7 @@ class TautulliAPI(object):
             # Platform Overrides
             platform_name = session.platform
             if platform_name in 'osx':
-                platform_name = 'MacOS'
+                platform_name = 'macOS'
             if platform_name in 'windows':
                 platform_name = 'Windows'