


Now that you have a bootable installer drive for macOS Monterey beta, your an use it to boot any compatible Mac, or to update and install macOS Monterey 12 beta onto a compatible Mac. This process may take a little bit, but the command line updates as progress continues, and eventually it will reach 100% to indicate the USB installer drive has successfully been created. Hit return and authenticate with the admin password to start the process of building the bootable installer USB drive.Sudo /Applications/Install\ macOS\ Monterey\ beta.app/Contents/Resources/createinstallmedia -volume /Volumes/MontereyBetaUSB -nointeraction Sudo /Applications/Install\ macOS\ 12\ Beta.app/Contents/Resources/createinstallmedia -volume /Volumes/MontereyBetaUSB -nointeraction Sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia -volume /Volumes/MontereyUSB -nointeraction Enter the following command at the Terminal, replacing “MontereyBetaUSB” with the name of the USB thumb drive:.Open “Terminal” on the Mac by hitting Command + Spacebar and typing ‘Terminal’ and hitting the return key (or open Terminal via Launchpad or your method of choice).Rename the USB drive to an obvious name, like “MontereyBetaUSB”.Download macOS Monterey Beta to the Mac, the “Install macOS Monterey Beta.app” application should be in the /Applications folder.How to Create a Bootable macOS Monterey Beta Install Driveīe sure to use precise syntax at the command line, as typos and errors can result in the commands not working as expected, or even formatting the wrong disk.

You can also download full installers and make boot disks with a tool like MDS, though we’re focusing on the traditional Terminal method here rather than using a third party tool.

