Old versions of Mac OS X

 

https://support.apple.com/en-us/HT211683

https://apps.apple.com/us/app/macos-catalina/id1466841314?mt=12 10.15
https://apps.apple.com/us/app/macos-mojave/id1398502828?mt=12 10.14
https://apps.apple.com/us/app/macos-high-sierra/id1246284741?mt=12 10.13
http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg 10.12
http://updates-http.cdn-apple.com/2019/cert/061-41424-20191024-218af9ec-cf50-4516-9011-228c78eda3d2/InstallMacOSX.dmg 10.11 
http://updates-http.cdn-apple.com/2019/cert/061-41343-20191023-02465f92-3ab5-4c92-bfe2-b725447a070d/InstallMacOSX.dmg 10.10

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