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Hello. can I downgrade my MacOs Catalina to the old version by formatting my macbook ?

Hello. I'd updated my macbook to the MacOS Catalina. Then, my microsoft office also been updated to the latest version which is Microsoft 365. This cause me to unable to save all my worksheet due to no license activation key. Is there any solution? will downgrading my MacOS to the previous version will settle this problem?

MacBook Air 13", macOS 10.15

Posted on Dec 30, 2019 12:44 AM

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Posted on Dec 30, 2019 5:44 AM

As long as you had a backup, it shouldn't be any problem.

Revert your Mac to a previous macOS version - Apple Support

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Hello. can I downgrade my MacOs Catalina to the old version by formatting my macbook ?

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