https://wccftech.com/macos-big-sur-will-install-software-updates-faster-than-ever/ > macOS Big Sur, Apple's latest major update for its desktop operating system, will feature faster software updates in the future thanks to background installation. > macOS already supports download software updates in the background, however, installation is a different story. When the update is downloaded, the installation process starts afterward and requires a few reboots to complete. Apple has finally improved this process by enabling updates to install in the background.