

Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/BigSurUSB -nointeraction Enter the exact command at the Terminal, replacing “BigSurUSB” with the name of your USB thumb drive if you changed it:.Open “Terminal” by hitting Command + Spacebar and typing ‘Terminal’ and hitting the return key, or open Terminal through the Utilities older.Connect the USB thumb drive to the Mac, name the drive something obvious like “BigSurUSB”.Download macOS Big Sur if you haven’t done so already.Backup your Mac and proceed at your own risk. Use exact syntax at the command line, as failure to do so can result in erasing the wrong volume. How to Create a Bootable macOS Big Sur Install Drive

If you’re not comfortable with the command line, you can also use a tool like MDS to download installers and create boot disks with. If you’re not familiar with the command line, be sure to backup the Mac first, and to follow the instructions exactly. MacOS Big Sur compatible Mac to download and create the installer, and to install ontoīe aware this requires using the command line.


There are many useful reasons to have a bootable installer USB drive for macOS Big Sur, whether to perform updates, installs, clean installs, install onto multiple machines, have as a troubleshooting tool, and so much more.
