TL;DR: Follow the Mac manual uninstall steps. Contact tech support and ask for a download version of your CD version. If needed, ask for a manual download version of your state version. Install TurboTax and update. If needed, quit TurboTax and manually install your state version. Start TurboTax and, hopefully, efile.
My setup: TurboTax Deluxe 2019 CD with Arkansas state with all "check for updates" updates installed on Mac OS 10.14.6.
Issue: When efiling federal and state, would not validate. Error message indicated there is an update that is required but "check for updates" says all updates installed.
Troubleshooting attempt # 1: using the "forced" check for updates by holding down the shift key when checking. Installed the forced updated. Quit TurboTax. Started TurboTax and attempted to efile again. Same error message.
Troubleshooting attempt # 2: followed the Mac TurboTax manual uninstall instructions from https://ttlc.intuit.com/community/tax-topics/help/state-loop-indicates-turbotax-is-up-to-date-after-... and reinstalled from CD. Forced update. Attempted to efile again. Same error message again.
Troubleshooting attempt # 3: contacted TurboTax tech support. The tech providing me with a download of TurboTax Deluxe in my Intuit download account. The tech didn't prompt me to run through the Mac manual uninstall instructions. Attempted to efile again. Same error message again.
Troubleshooting attempt # 4: TurboTax tech provided me with a download of my state tax file in my Intuit download account. Manually installed my state. Attempted to efile again. Same error message again.
Troubleshooting attempt # 5: Did the Mac manual uninstall steps, reinstalled from the main TurboTax download file. Let it update on first run. When it opened my 2019 file, it detected that my state was not installed. Quit TurboTax. Manually installed my state tax file from the download. Attempted to efile again. SUCCESS!
