Solved
I have run the update download/installation several times, but I still can't get the program to open.
Reboot your MAC, after rebooting, you can try to open TurboTax again.
If this does not solve the issue, follow these instructions to uninstall and reinstall TurboTax on your Mac
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.