Mac users may occasionally find themselves wanting to clean install macOS Big Sur onto a Mac. A clean installation of macOS Big Sur basically means the entire hard drive – including the system itself, all data, all apps, user accounts, literally everything – is erased, and then a fresh clean install of macOS Big Sur is installed onto the Mac. In this way it’s sort of like a factory reset or a fresh start, or what PC users sometimes refer to as reformatting, because there will be nothing left on the Mac at all, and booting it up will be similar to booting up a…