Turbotax Desktop Premier will NOT e-file on Mac

Turbotax Desktop Premier will NOT e-file on my Mac.  Returns are successfully finished with no problems mentioned.  Was able to print returns.  I just updated the Turbotax program and it still won't e-file.  Questionnaire just stops suddenly in the File Your Return section with nowhere to go but "back".  No continuation onto a filing process.  What to do??