OSX backend. 2D histograms are flipped vertically #3806
Merged
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This bug only exists on master but not in 1.4.2. Moreover this only happens on screen but is correct when saving the figure. I guess this relates to how the y-axis is inverted in images.
This can be seen by running api/power_norm_demo.py where the covariance is inverted.
The qt4/5 gtk3Agg and tkAgg are not affected.
OS x (screenshot)
OSX result (saved fig)

In the docs: