This is #410 — tkagg is broken (upstream bug) on MacOS, and you need to use a non-tk backend.

[liuyoufang]

I also tried to changed the backend to Qt5agg and macosx, which is still not working apparently

This is #410 — tkagg is broken (upstream bug) on MacOS, and you need to use a non-tk backend.

Are you using the Conda Python? (What is PyPlot.PyCall.python?) Conda can automatically install the qt backend for you.

Originally posted by @stevengj in #441 (comment)

[stevengj]

Please don't post duplicate issues.