Once finished, do not click install. Look in your /Applications folder for a file named Install macOS Big Sur.app . Converting the App to a DMG
Click "Get." This will open your System Settings/Preferences to download the installer. macos big sur dmg download exclusive
Downloading the doesn't have to be a gamble. By using the App Store or the Terminal softwareupdate command, you ensure you're getting a secure, unmodified version of the OS. Whether you're a developer needing a testbed or a vintage Mac enthusiast, Big Sur remains a rock-solid choice. Once finished, do not click install