I'm working on some kivy code that's working fine on windows 10, but crashes on osx sierra, I've isolated that the crash happens when I import kivy.core.window along side matplotlib:

import matplotlib
matplotlib.use("TkAgg")
from matplotlib import pyplot as plt
import kivy.core.window

It also crashes without matplotlib.use("TkAgg"). This is just included to show that the issue isn`t fixed by this as other questions suggest.

The output from the exception is:

2017-03-08 13:33:32.461 Python[28614:209475] -[SDLApplication _setup:]: unrecognized selector sent to instance 0x1020ea6c0
2017-03-08 13:33:32.464 Python[28614:209475] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SDLApplication _setup:]: unrecognized selector sent to instance 0x1020ea6c0'
*** First throw call stack:
(
0   CoreFoundation  0x00007fffa8716e7b  __exceptionPreprocess + 171
1   libobjc.A.dylib                     0x00007fffbd300cad objc_exception_throw + 48
...
)
libc++abi.dylib: terminating with uncaught exception of type NSException

What could be causing this, and where do I start looking to debug this type of exception it?

After solving this I ran into a perhaps related problem, noted in this question.

I managed to solved this problem through running

pip install kivy-gardens
garden install matplotlib

I'm not sure why this worked, but it did remove this root of the NSException.

I'm now getting a different NSException caused by a different interplay of dependencies that I'll post as a new question.