7 returns? I hope you are not doing this for pay. TurboTax is not licensed for professional use and it is violation of IRS regulations to use TurboTax for pay.
Having said that, first I would restart the Mac.
If it continues to hang on just one return then the .tax file might have become corrupt for that return. Try starting a new tax return and save it to a different name and .tax file and see if it hangs again at the same place.
Make sure the software is up to date. Top menu bar -> TurboTax -> About TurboTax -> More Info.
It should be r20 Build date Mar 29, 2019. If not it has not updated.
If it still hangs, then exactally what screen are you on when it hangs and what was the last thing entered?
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**