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How to update OS X Yosemite to macOS Big Sur?

iMac 21.5″, OS X 10.10

Posted on Jun 20, 2021 7:28 PM

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731,741 points

Posted on Jun 20, 2021 7:32 PM

Back up your data, check your applications for compatibility, and depending on which iMac model you have, click on High Sierra, Mojave, Catalina, or Big Sur. Big Sur requires it to be a 2014 or newer one.

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