diff --git a/media/webrtc/trunk/build/mac/find_sdk_uxp.py b/media/webrtc/trunk/build/mac/find_sdk_uxp.py
index 4d0cac51a6..6a84fdd7c2 100644
--- a/media/webrtc/trunk/build/mac/find_sdk_uxp.py
+++ b/media/webrtc/trunk/build/mac/find_sdk_uxp.py
@@ -19,11 +19,14 @@ if sys.platform == 'darwin':
       print("find_sdk_uxp.py: error: Specified path does not exist or is not a directory")
       sys.exit(1)
 
-  KNOWN_SDK_VERSIONS = ["10.7", "10.8", "10.9", "10.10", "10.11"
-                        "10.12", "10.13", "10.14", "10.15", "10.16",
-                        "11.0", "11.1", "11.2", "11.3", "12.0", "12.1", "12.3",
-                        "13.0", "13.1", "13.2", "14.0", "14.2", "14.4", "14.5",
-                        "15.0", "15.1", "15.2", "15.4"]
+  KNOWN_SDK_VERSIONS = ["10.4", "10.5", "10.6", "10.7", "10.8", "10.9", "10.10",
+                        "10.11", "10.12", "10.13", "10.14", "10.15", "10.16",
+                        "11.0", "11.1", "11.2", "11.3",
+                        "12.0", "12.1", "12.3",
+                        "13.0", "13.1", "13.2",
+                        "14.0", "14.2", "14.4", "14.5",
+                        "15.0", "15.1", "15.2", "15.4",
+                        "26.0", "26.1", "26.4"]
 
   REGEX = "^MacOSX(\d+\.\d+)\.sdk$"
   SDK_VERSION = re.findall(REGEX, os.path.basename(SDK_PATH))