有一次开发发现，UnityWebRequest有一个路径在window上运行正常，在mac上运行就会报错，找不到路径
UnityWebRequest request = UnityWebRequest.Get(assetBundleConfigPath);
//mac必须这样写，前面加"file://"
#if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
request = UnityWebRequest.Get("file://" +assetBundleConfigPath);
#endif
还有就是
window上对路径中特殊符号的替换处理
string assetbundleName = directoryInfo.FullName.Substring(Application.dataPath.Length + 1).Replace('\\', '_').ToLower();
#if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
assetbundleName = directoryInfo.FullName.Substring(Application.dataPath.Length + 1).Replace('/', '_').ToLower();
#endif