modules/fxpackager/src/main/java/com/oracle/tools/packager/mac/MacAppStoreBundler.java

*** 319,328 ****
--- 319,332 ----
      }
  
      @Override
      public boolean validate(Map<String, ? super Object> params) throws UnsupportedPlatformException, ConfigException {
          try {
+             if (!System.getProperty("os.name").toLowerCase().contains("os x")) {
+                 throw new UnsupportedPlatformException();
+             }
+ 
              if (params == null) {
                  throw new ConfigException(
                          I18N.getString("error.parameters-null"),
                          I18N.getString("error.parameters-null.advice"));
              }