diff --git a/installinstallmacos.py b/installinstallmacos.py
index 984cda0..0c5d461 100755
--- a/installinstallmacos.py
+++ b/installinstallmacos.py
@@ -66,6 +66,9 @@
     '21': 'https://swscan.apple.com/content/catalogs/others/'
           'index-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9'
           '-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog',
+    '22': 'https://swscan.apple.com/content/catalogs/others/'
+          'index-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9'
+          '-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog'
 }
 
 SEED_CATALOGS_PLIST = (