GET
button or iCloud download icon.Install macOS Catalina
. If the installer app opens after downloading, quit it without continuing installation.Spacebar
key (or right-click on the file and choose “Get Info”). The complete installer should be around 8.1 GB rather than the tiny (just tens of megabytes) incomplete installer that requires additional downloads.Enter
key to create the bootable installer./Applications/Install macOS Catalina.app/
in this command with the path to your macOS Catalina installer app.MyVolume
is the name of the USB drive (external hard drive or flash drive) you’re using. If it has a different name, replace MyVolume
in this command with the name of your USB drive.Enter
key.Y
and press the Enter
key to confirm that you want to erase the USB drive.Done
. This can take a while, so be patient. When it’s done, the USB drive will have the same name as the installer you downloaded, i.e. “Install macOS Catalina”.Option
key while booting the Mac. So simple isn’t it?