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sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina Terminal will erase the drive and copy the files. 3. Performing the Clean Installation Back up all data via Time Machine before proceeding. Plug in USB: Plug the bootable USB into the Mac. Boot from USB: Restart the Mac while holding down the Option (Alt) ⌥ key. Select the "Install macOS Catalina" volume. Erase Drive: Disk Utility

https://apps.apple.com/us/app/macos-catalina/id1466841314?ls=1&mt=12 (Opens the Mac App Store) sudo /Applications/Install\ macOS\ Catalina

Press and type your administrator password (characters won't show). sudo /Applications/Install\ macOS\ Catalina

Always source your macOS DMG/Installer directly from Apple's servers to ensure your system remains secure and stable. Terminal commands to create the bootable USB drive once you have the file? sudo /Applications/Install\ macOS\ Catalina