The Mac App Store will be your main way to download macOS. You can
download the following versions – 10.13, 10.14, 10.15 & 11.0. Each
link below will open up that version in the Mac App Store. All you need
to do is, click the Download Button. When the download is finished, the
installer will be in /Applications
.
1 – macOS Monterey 12
https://apps.apple.com/us/app/macos-monterey/id1576738294
2 – macOS Big Sur 11
https://apps.apple.com/us/app/macos-big-sur/id1526878132
3 – macOS Catalina 10.15
https://apps.apple.com/us/app/macos-catalina/id1466841314
4 – macOS Mojave 10.14
https://apps.apple.com/us/app/macos-mojave/id1398502828
5 – macOS High Sierra 10.13
https://apps.apple.com/us/app/macos-high-sierra/id1246284741?mt=12
6 – macOS Sierra 10.12
https://apps.apple.com/us/app/macos-sierra/id1127487414