https://blog.wongcw.com/2018/11/09/%e8%98%8b%e6%9e%9c%e7%82%ba%e6%96%b0macbook-air-%e9%96%8b%e5%b0%8f%e7%81%b6-macos-10-14-1-%e8%a3%9c%e5%85%85%e6%9b%b4%e6%96%b0/