Need upgrade to OSX 10.12
I own a iMac G5, Serial Number QP*****TAR. My customer number is *****.
I have a current operating system OS X 10.11.6 and I need an upgrade to OS X 10.12 to install my Turbo Tax Deluxe 2018. How can I upgrade to OS X 10.12 (or later) to file my 2018 Federal and Stat Income Taxes?
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