If your current Mac is compatible with Big Sur, you can download it via the App Store.
The .dmg file is a disk image file that contains the macOS Big Sur 11.2.1 installer. Downloading the .dmg file allows you to: macos big sur 1121 installer dmg
: A second version of the 11.2.1 update (Build 20D75) was later issued to fix a flaw where the installer failed to check for sufficient disk space before starting, which previously could leave a Mac unusable if it ran out of room mid-install. Installer Details and Requirements If your current Mac is compatible with Big
: The official Apple command for creating a bootable installer for macOS Big Sur is: macos big sur 1121 installer dmg