upgrade to OS X version 10.9.5
What is the next version I can upgrade my imac OS X version 10.9.5
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Back up your data, check your applications for compatibility, and depending on which iMac model you have, download El Capitan, High Sierra, or Catalina. Chronologically, the next release was Yosemite, but you should only upgrade to it if you're going to stay there.
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