I have had the same issue and called Turbo Tax support, spoke with a very patient rep. She was able to get their investigation team to reproduce the problem, so it is at least now a "known issue". No timeline for a fix. I have also upgraded from 11.7.6 to 11.7.8 and re-installed TT -- same crash error message, EXEC_CRASH (SIGABRT)... DYLD [0x4] Symbol Missing. If you have time, suggest calling TT Support 1-800-446-8848, so they know that multiple people have this issue and can prioritize the fix
