sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Be extremely cautious when searching for "macOS Big Sur DMG download" on the internet. Third-party sites hosting DMG files can inject malware, adware, or corrupted system images. The only safe source for macOS installers is Apple itself . macos big sur dmg
You’ll find many websites offering a pre-made “macOS Big Sur.dmg” file. Unofficial DMGs may contain: sudo /Applications/Install\ macOS\ Big\ Sur