An Intuit support person was able to help me solve the issue. She directed me to a patch which I downloaded from the Intuit site and applied through a terminal command. She walked me through the process on the phone. After applying the patch, the 2014 TT app ran on my Mac and I was able to access my return. The patch is not referenced anywhere on the Intuit site as far as I could see, so it is necessary to work through phone support.
