: Open the DMG and run the .pkg file inside. This installs the "Install OS X El Capitan" app into your Applications folder.
: You can use the softwareupdate command in Terminal to fetch full installers for older macOS versions. How to Create a High-Quality ISO download iso mac os x el capitan high quality
: For users with a compatible Mac, the installer can be found by searching for "El Capitan" in the App Store, though it may only appear in your "Purchased" history if you've downloaded it previously. : Open the DMG and run the