OSX El Capitan 10.11.6 upgrade
I have an iMac with OSX El Capitan version 10.11.6 . Is it true that I cannot update this?
iMac 21.5″, OS X 10.11
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Back up your data, check your applications for compatibility, and depending on which iMac model you have, download High Sierra or Catalina; the maximum OS for a 21.5-inch iMac will be one of these. They're full-version upgrades and won't appear in the Updates list.
A 20-inch or 24-inch iMac can be upgraded to El Capitan at most.
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