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Dark guide card headed Build a bootable macOS USB, showing the four steps in order: step one pick a version with softwareupdate --list-full-installers, step two verify it by listing the createinstallmedia path inside the installer, step three write the drive with createinstallmedia --volume /Volumes/MyVolume, and step four start from it using the power button on Apple silicon or Option on Intel

How to Create a Bootable macOS USB Installer

A bootable macOS USB stick lets you install or reinstall macOS on a Mac that will not start normally, set up several machines without downloading the installer each time, or do a clean install rather…