protected static String determineAllUserLocation() {
   if (gov.nasa.worldwind.Configuration.isMacOS()) {
     return "/Library/Caches";
   } else if (gov.nasa.worldwind.Configuration.isWindowsOS()) {
     String path = System.getenv("ALLUSERSPROFILE");
     if (path == null) {
       Logging.logger().severe("generic.AllUsersWindowsProfileNotKnown");
       return null;
     }
     return path + (Configuration.isWindows7OS() ? "" : "\\Application Data");
   } else if (gov.nasa.worldwind.Configuration.isLinuxOS()
       || gov.nasa.worldwind.Configuration.isUnixOS()
       || gov.nasa.worldwind.Configuration.isSolarisOS()) {
     return "/var/cache/";
   } else {
     Logging.logger().warning("generic.UnknownOperatingSystem");
     return null;
   }
 }