You will need to use the “createinstallmedia” command. Click the Format pop-up menu, select Mac OS Extended (Journaled).Įnsure that you are entering the command correctly.Select your external device like the USB drive.In Disk Utility, Click View > Show All Devices.Open Applications > Utilities and double-click Disk Utility.

Ensure that they are formatted as Mac OS Extended. You may use a USB flash drive or other secondary volume to do this. Check your external drive or secondary volume You can verify this by going to your Applications folder.Īnd lastly, if the installer launches automatically after downloading, quit it. Before you run the command, please ensure to download the installer locally on your Mac, such as macOS Monterey, macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra.įurthermore, ensure that the installer is downloaded to the Applications folder, as a single “Install” file.

You may receive this error message if you do not have the installer for the applicable macOS version downloaded on your system. sudo: /Applications/Install macOS Monterey.app/Contents/Resources/createinstallmedia: command not foundĭownload the installer from the App Store.You may sometimes run into a command line error message saying “command not found” in Terminal while trying to follow the steps necessary to create a bootable installer of the Mac operating system, macOS X El Capitan, Yosemite, Mavericks, Sierra, High Sierra, Mojave, Catalina, Big Sur and Monterey.įor example, you may receive this message: You may want to create a bootable installer drive for macOS.

Make a mac usb boot drive