I have the same problem - 2014 iMac with Big Sur wont load TT2023 that I paid for. Not the first time TT has let me down like this. A couple of years ago I was ...
I've had the same experience. I downloaded TT 2020 in Oct. December I "upgraded" the OS to Big Sur. Started taxes in Jan - all good. Then, a ~ week ago, it woul...