They do, literally first hit of "older macos download" is this: https://support.apple.com/en-us/HT211683 https://support.apple.com/en-us/HT211683 For latest 4

They do, literally first hit of "older macos download" is this: https://support.apple.com/en-us/HT211683 https://support.apple.com/en-us/HT211683 For latest 4 versions, you need to use appstore. Before those 4, you can directly download ISO/DMG from a "S3" bucket...