Did you try to remove just the one file in the Mac library? I posted detailed instructions yesterday in this thread to just remove the file: ~ library/Caches/KSCrash/Turbotax
I struggled with the problem for weeks--see my earlier posts. The complete uninstall did NOT work for me.
I had created a 2nd user account with admin privileges as a very very inconvenient workaround. However, by deleting this single file, my TT21 Deluxe launched fine on my primary user account. Good luck!
