diff --git a/lib/spack/spack/operating_systems/mac_os.py b/lib/spack/spack/operating_systems/mac_os.py
index 65d2317d465..d52885fd546 100644
--- a/lib/spack/spack/operating_systems/mac_os.py
+++ b/lib/spack/spack/operating_systems/mac_os.py
@@ -142,6 +142,7 @@ def __init__(self):
             "11": "bigsur",
             "12": "monterey",
             "13": "ventura",
+            "14": "sonoma",
         }
 
         version = macos_version()