I installed Python 3.6 and matplotlib (along with numpy, scipy, etc) through MacPorts on my iMac G4 but importing matplotlib.pyplot crashes python: Code: 192:~ Raul$ python3 Python 3.6.5 (default, Mar 29 2018, 15:41:19) [GCC 4.2.1 (Apple Inc. build 5577)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import matplotlib.pyplot as plt machdep: class is not implemented terminate called after throwing an instance of 'std::runtime_error' what(): Couldn't close file Abort trap 192:~ Raul$ Any idea why this happens? Settings: iMac G4 1.25GHz, Mac OS X 10.5.8. Python 3.6.5. Matplotlib 2.1.1 installed through MacPorts with one dependency (qhull) installed with GCC 4.8 as 4.2 was blacklisted in MacPort's portfile.