macOS 10.14.6 -anaconda install Python 3.7.3  pip install appJar (0.94.0) 

On start of app with app.go() a crash will occur causing mac to logout.

Python 3.7.2 does not show this behavior

Will document on medium.

https://raw.githubusercontent.com/borosilicate/RCSB-Protein-Data-Bank-CSV-Maker/master/pygui.py

Does this application use Tkinter?  

If so, this is a duplicate of #37833, and a bug in macOS triggered by (amongst others) anaconda but (AFAIK) not by the Python.org installer.

The "logout" is a crash in the WindowServer proces, which is something that should never happen. I've filed an issue with Apple about that, but have no idea if or when they will look at that.

Thanks for the fast response it uses appJar which is a very similar GUI
package but not the same one. AppJar is based of it but I don’t believe it
was built off it.

On Fri, Aug 16, 2019 at 3:55 PM Ronald Oussoren <report@bugs.python.org>
wrote:

>
> Ronald Oussoren <ronaldoussoren@mac.com> added the comment:
>
> Does this application use Tkinter?
>
> If so, this is a duplicate of #37833, and a bug in macOS triggered by
> (amongst others) anaconda but (AFAIK) not by the Python.org installer.
>
> The "logout" is a crash in the WindowServer proces, which is something
> that should never happen. I've filed an issue with Apple about that, but
> have no idea if or when they will look at that.
>
> ----------
> nosy: +ronaldoussoren
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue37877>
> _______________________________________
>

Hopefully apple will fix this.
https://medium.com/@michaeljosephhearn/macos-mojave-crash-6fd1e69d3d34