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un-downloading catalina

how do i un-download catalina back to mojave? photoshop CS6 won't open so need to revert back to my old software

MacBook Pro 13", macOS 10.15

Posted on Nov 4, 2019 1:39 PM

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Posted on Nov 4, 2019 1:47 PM

If you made a Time Machine backup prior to updating see here: Revert your Mac to a previous macOS version - Apple Support

Otherwise, you will need to wipe the Mac and install macOS from scratch, which is quite a bit harder to do.

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