: For older versions (e.g., Catalina, Big Sur), Apple provides direct links to Apple Support Terminal Command : You can fetch a full installer by running softwareupdate --fetch-full-installer in the Terminal. Apple Support How to Create a macOS ISO
: For older versions (e.g., Catalina, Big Sur), Apple provides direct links to Apple Support Terminal Command : You can fetch a full installer by running softwareupdate --fetch-full-installer in the Terminal. Apple Support How to Create a macOS ISO