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Have IMAC 21.5" made late 2011. Have os x 10.9.5 now and need to know how to update

How can I update my IMAC? Everytime i try it says "cannot be installed on this computer"

iMac Line (2012 and Later)

Posted on Sep 17, 2020 3:50 PM

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731,951 points

Posted on Sep 17, 2020 3:53 PM

Back up your data, check your applications for compatibility, and download High Sierra. That Mac model can't be upgraded past it.

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