Python 3.6.3, Tcl/Tk, and Mac, stability issues

[ErikFrisk]

I don't use IDLE so that is not a problem. It is when I use matplotlib with the TkAgg backend that there are severe problems (I think, I am not entirely sure the reason for my problems)

I don't know which bugs that are fixed, but python.org states in their latest download that Apples Tcl/Tk should not be used and they suggest to use ActiveTcl/Tk. However, the version linked in the python binary is not possible to download for Mac so I am a little stuck at the moment.