I had the exact same experience, with both the 2020 version and the 2021 version. Program worked fine when first installed then one day, would check for updates and then just close. New Macbook, MacOS was current and met their requirements. Intuit customer support was not helpful (spent HOURS on the phone with them uninstalling/reinstalling/typical support nonsense they run you through when they have no idea what to do), which ended with them giving me free online filing (which I had no choice but to accept because I needed to file, and by the way, required me to COMPLETELY REDO MY RETURN), but I really do not want to file my taxes this way on an ongoing basis. This is a known issue they are not addressing (obviously, since the program did the exact same thing last year and it’s still doing it this year). Too bad, because I really prefer their product; however, it’s useless if you can’t open it! TT is supposed to make your taxes easier to file, not harder. I have used TT for years, and loved it without issue, until 2020.
