![]() ![]() ![]() Take a moment to see how to create a bootable macOS USB Drive.Ready To Begin?: If it is a MacBook, plug it to power as it requires significant energy, and the process is lengthy How to Downgrade macOS Big Sur Beta to macOS Catalina #īack up your MacErase macOS Big Sur from Mac DriveHow to Reinstall macOS Catalina from InternetHow to Reinstall macOS Catalina from USB DriveHow to Restore Time Machine Backup Back up your Mac #īefore installing macOS Big Sur beta, did you make a Time Machine backup of your Mac running macOS Catalina? If yes, you can restore all files and data from it after downgrading. However, then you put it on a pen drive, and thus the actual installation is quick. And for the second method also require the internet to download the OS. For the first method, high-speed internet is recommended as it will download the full macOS (around 8+ GB). Understand The Whole Process: Downgrading involves Backup (optional but recommended) → Erasing macOS Big Sur → Installing macOS Catalina → Restoring from Time Machine backup (if you have a macOS Catalina backup)Two Methods: You can install macOS Catalina using the internet or a bootable macOS Catalina USB drive. ![]()
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