https://apps.apple.com/ru/app/macos-big-sur/id1526878132?mt=12
http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg
https://apps.apple.com/ru/app/macos-high-sierra/id1246284741?mt=12