How do I downgrade my Mac from Big Sur to Catalina?

September 28, 2022

How do I downgrade my Mac from Big Sur to Catalina?
Downgrade Big Sur using Time Machine

Erase your Mac’s system disk.
Restoring your Mac using Time Machine.
Create a bootable drive for Catalina.
Prepare your Mac to boot from USB.
Installing Catalina from USB.

Downgrade Big Sur using Time Machine
  1. Erase your Mac’s system disk.
  2. Restoring your Mac using Time Machine.
  3. Create a bootable drive for Catalina.
  4. Prepare your Mac to boot from USB.
  5. Installing Catalina from USB.

Related posts:

  1. How do I revert back to an old Mac without Time Machine? How do I revert back to an old Mac without Time Machine? How to Downgrade macOS without Time Machine. If you don't have a Time Machine backup, you'll have to downgrade macOS the old-fashioned way: by resetting your hard drive. This method will wipe the data from your hard drive,...
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