OS X UPDATE
Hello,
I have downloaded Sketchup, however, I cannot load as it says that I need OS X version 10.13 or later.
I am currently using OS X EL Capitan; how do I update safely?
Thank you
iMac 21.5″, macOS 10.13
Back up your data, check your applications for compatibility, and depending on which iMac model you have, click on High Sierra, Catalina, or Big Sur.
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