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macOS Catalina

How can I delete macOS Catalina and revert to either High Sierra or Mojave?

Posted on Nov 28, 2019 1:10 PM

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Question marked as Top-ranking reply

Posted on Nov 28, 2019 1:13 PM

Use your Time Machine backup to revert:

Restore your Mac from a backup - Apple Support


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macOS Catalina

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