old versions of macos 10.10 to 10.15

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

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