diff --git a/src/detection/os/os_apple.m b/src/detection/os/os_apple.m
index 5da14ad45..654d32889 100644
--- a/src/detection/os/os_apple.m
+++ b/src/detection/os/os_apple.m
@@ -25,6 +25,11 @@ static void parseSystemVersion(FFOSResult* os)
         ffStrbufInitS(&os->version, value.UTF8String);
     if((value = dict[@"ProductBuildVersion"]))
         ffStrbufInitS(&os->buildID, value.UTF8String);
+    if (ffStrbufStartsWithS(&os->version, "16."))
+    {
+        // macOS 26 Tahoe. #1809
+        os->version.chars[0] = '2';
+    }
 }
 
 static bool detectOSCodeName(FFOSResult* os)