Catalina(10.15)正式版下载链接：
https://apps.apple.com/cn/app/macos-catalina/id1466841314?mt=12
Mojave(10.14)正式版下载链接：
https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12
High Sierra(10.13)正式版下载链接：
[https://itunes.apple.com/cn/app/macos-high-sierra/id1246284741?mt=12
Sierra(10.12.6)正式版下载链接：
https://itunes.apple.com/cn/app/macos-sierra/id1127487414?mt=12
OS X El Capitan(10.11.6)正式版下载链接
https://itunes.apple.com/cn/app/os-x-el-capitan/id1147835434?mt=12