I spent hours on the phone with support. I finally insisted that I be transferred to the next level of support. The first guy Carlos wasted 2 hours of my time. The second guy Kareem was great. He's seen this problem before. He had me set up a new user on my Mac with admin privileges. I was able to install and open TT21 under the new user, and then I copied my tax files onto a flash drive and brought them onto TT in the new user side. He said that TT doesn't know what's causing TT21 to crash. This problem started with TT21 he said. This is a workaround. I'm being very careful to save and close the tax return and exit the software each time.
