/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.base;

import java.io.File ;

public class Sys {
    /** Is this windows? */
    public static final boolean isWindows = (File.pathSeparatorChar == ';') ;
}


@@ -843,21 +843,44 @@
 ort 
-java.io.File 
+org.apache.commons.lang3.SystemUtils
 ;%0A%0Ap
@@ -973,41 +973,125 @@
 s = 
-(File.pathSeparatorChar == ';') 
+SystemUtils.IS_OS_WINDOWS;%0A%0A    /** Is this MacOS? */%0A    public static final boolean isMacOS = SystemUtils.IS_OS_MAC
 ;%0A%7D%0A
-%0A

Use apache.common.lang3 for OS determination.