diff --git a/code/client/munkilib/appleupdates.py b/code/client/munkilib/appleupdates.py
index f3f8137c..6e6e2abb 100755
--- a/code/client/munkilib/appleupdates.py
+++ b/code/client/munkilib/appleupdates.py
@@ -79,6 +79,9 @@ DEFAULT_CATALOG_URLS = {
     '10.11': ('https://swscan.apple.com/content/catalogs/others/'
               'index-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard'
               '.merged-1.sucatalog')
+    '10.12': ('https://swscan.apple.com/content/catalogs/others/'
+              'index-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard'
+              '-leopard.merged-1.sucatalog')
 }
 
 # Preference domain for Apple Software Update.