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late 2009 and mid 2010 iMac I would like to upgrade from Sierra to High Sierra.

How do I upgrade to High Sierra? When I click updates from About this Mac it says up to date and High Sierra does not show in App Store.


Also my 2009 and 2010 iMacs work well with Target mode. Will upgrade to High Sierra affect that?

Posted on Feb 17, 2022 12:02 PM

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late 2009 and mid 2010 iMac I would like to upgrade from Sierra to High Sierra.

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