diff --git a/java/client/src/org/openqa/selenium/Platform.java b/java/client/src/org/openqa/selenium/Platform.java
index 98da26ecb7230..c871cf43ec57f 100644
--- a/java/client/src/org/openqa/selenium/Platform.java
+++ b/java/client/src/org/openqa/selenium/Platform.java
@@ -136,6 +136,17 @@ public String toString() {
     }
   },
 
+  SIERRA("sierra", "macos 10.12") {
+    @Override
+    public Platform family() {
+      return MAC;
+    }
+    @Override
+    public String toString() {
+      return "macOS 10.12";
+    }
+  },
+
   /**
    * Many platforms have UNIX traits, amongst them LINUX, Solaris and BSD.
    */