I am filing my 2016 taxes and it keeps freezing at the end when trying to select either direct deposit or check by mail. Please help!

@This is because the 2016 program was written prior to OS X 10.13.2, which is what you appear to be using.   See my answer below for the workaround provided by SuperUser @macuser_22  , which will tell you how to do that in Forms Mode to avoid that freeze.

Please see answer below.

[Edited 2.22.18 9:47PM]

This answer by SuperUser macuser_22 will tell you why that is occurring and the workaround.   Since you are using OS X 10.13.2, and the 2016 program was written prior to that, the workaround to avoid that freeze when choosing a refund method is to make the choices in Forms Mode.   See the details in the answer below:

https://ttlc.intuit.com/replies/6571059