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Installing MacOS 10.15 (Catalina)

I have tried downloading 10.15.2, the combo update 10.15.7, the update 10.15.6, and none will install on a MacBook Air (Early 2015). They all give the same message: they need 10.15. No installer of the original Catalina can be found in the App Store. Would appreciate any suggestions.

Posted on Dec 12, 2021 12:40 PM

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Posted on Dec 12, 2021 1:50 PM

Back up your data, check your applications for compatibility, and click on Catalina, Big Sur, or Monterey. You may need to wait for Apple to fix an issue with the App Store servers before the Catalina and Big Sur links will work.


The updaters you found can't be used for a full-version upgrade.


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Installing MacOS 10.15 (Catalina)

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