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Need to downgrade macOS Catalina to macOS High Sierra

I need to downgrade my macOS 10.15 to 10.12 or 10.13 because after upgradation most of the softwares are not working.


[Edited by Moderator]

MacBook Pro 15″, macOS 10.15

Posted on Aug 17, 2020 8:52 AM

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Need to downgrade macOS Catalina to macOS High Sierra

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