Open Terminal and paste the following: sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina
Open Disk Utility , select your USB, and format it as Mac OS Extended (Journaled) with a GUID Partition Map . Name the drive "Catalina". hot download macos catalina 10157 dmg
Are you looking to or perform a clean install on an older MacBook? The installer will download directly into your folder
The installer will download directly into your folder. How to Create a Bootable USB from the DMG/Installer Terminal Download (For Advanced Users) The safest way
Once you click "Get," the System Settings or Software Update pane will open to download the "Install macOS Catalina.app" file to your folder. 2. Terminal Download (For Advanced Users)
The safest way to get the installer is directly from Apple. However, Catalina no longer shows up in basic App Store searches on newer Macs. Download macOS Catalina via Mac App Store