https://blog.wongcw.com/2020/08/06/macos-big-sur%e8%bf%8e%e4%be%86beta-4%e6%9b%b4%e6%96%b0%e5%8f%af%e7%a6%81%e7%94%a8%e5%a3%81%e7%b4%99%e8%91%97%e8%89%b2%e4%bb%a5%e5%8a%a0%e5%bc%b7%e9%bb%91%e6%9a%97%e6%a8%a1%e5%bc%8f/