Use the createinstallmedia tool located inside the app package. sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --nointeraction
IT administrators often use macadmin-scripts to generate download URLs. These point to Apple’s content delivery network and require curl with authentication headers. macOS Big Sur 11.2.1 Installer DMG
You might wonder why anyone would seek out macOS Big Sur 11.2.1 specifically rather than newer versions like Monterey, Ventura, or Sonoma. There are several practical reasons: Use the createinstallmedia tool located inside the app
Easily install macOS on platforms like VMware, VirtualBox, or Parallels. macOS Big Sur 11.2.1 Installer DMG
Are you trying to (like the 11.2.1 MacBook Pro charging fix)?
and check the code signature of the contained app: