https://blog.wongcw.com/2018/10/30/%e3%80%8amacbook-pro-retina%e3%80%8b%e5%a4%96%e6%8e%a5%e8%9e%a2%e5%b9%95%e5%bf%85%e7%9f%a5%e8%88%87%e8%a8%ad%e5%ae%9a/