Mar 14, 2021 11:20 AM in response to mcpiper19 Last I checked TurboTax 2020 required macOS Mojave 10.14. You need a 2012 or later Mac to run Mojave. FWIW, Intuit does have an online version which should work. Reply User profile for user: lamb70 lamb70 User level: Level 1 4 poin...