https://3c.yipee.cc/27608/mac-os-x-mavericks-vs-yosemite%ef%bc%8c%e4%bd%a0%e5%96%9c%e6%ad%a1%e5%93%aa%e4%b8%80%e5%80%8b%e7%89%88%e6%9c%ac%e7%9a%84-app-icon%ef%bc%9f/