diff --git a/osxphotos/_constants.py b/osxphotos/_constants.py
index 497859a9..a244cf7a 100644
--- a/osxphotos/_constants.py
+++ b/osxphotos/_constants.py
@@ -119,6 +119,7 @@ _TESTED_OS_VERSIONS = [
     ("12", "3"),
     ("12", "4"),
     ("12", "5"),
+    ("12", "6"),
 ]
 
 # Photos 5 has persons who are empty string if unidentified face