I had the same issue after downloading a state - program crashed - have Mac High Sierra - uninstalled then reinstalled multiple times - called support - while on phone with them found a post about logging in as another user - I set up a second admin user on my MacBook Pro - logged out - then logged in as new user - attempted to open 2019 program @- IT WORKed - I was able to put the TT file in a shared folder then able to open and efile return - support sent me new download to install - it still didn’t work - so mu current work around is to log in to my Mac as the second user.
