how to upgrade from yosemite 10.10.5
how do you upgrade from yosemite 10.10.5 when the computer is showing no updates available?
iMac Line (2012 and Later)
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Back up your data, check your applications for compatibility, and depending on which iMac model you have, download Catalina or Big Sur through the links provided. They're full-version upgrades and won't appear in the Updates list.
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