I need to update my iMac from MacOS 10.13.6 to MacOS 10.14 so I can run TurboTax 2020
I need to update my iMac from MacOS 10.13.6 to MacOS 10.14 so I can run TurboTax 2020. How do I do this
iMac 21.5″, macOS 10.13
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Whether that is possible depends on which iMac you have. If "About this Mac..." shows your iMac to be 2011 or older, it is maxed out at 10.13.6; its older hardware can support no higher macOS.
If 2012 through 2013 it can run up to macOS 10.15 "Catalina." If 2014 or higher it can run Big Sur.
Link to available system upgrades are in this Apple article: