change Mac OS X to macOS on About

platform/util/src/com/intellij/openapi/util/SystemInfo.java

@@ -1,16 +1,4 @@
-// Copyright 2000-2017 JetBrains s.r.o.
-//
-// Licensed 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.
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.openapi.util;
 
 import com.intellij.openapi.util.io.PathExecLazyValue;
@@ -163,7 +151,11 @@ public class SystemInfo extends SystemInfoRt {
   }
 
   public static String getOsNameAndVersion() {
-    return System.getProperty("os.name") + " " + System.getProperty("os.version");
+    String osName = System.getProperty("os.name");
+    if (isMacOSSierra) {
+      osName = "macOS"; //JDK always returns Mac OS X
+    }
+    return osName + " " + System.getProperty("os.version");
   }
 
   private static int normalize(int number) {