Bring openCV window to front with focus on macOS

How to bring an openCV window to foreground with focus?

http://www.noah.org/wiki/OpenCV_display_window_on_top_with_focus doesn't do anything.

This achieves Topmost, but not Focus:

cv2.imshow('foo', my_2d_numpy_array)
cv2.setWindowProperty('foo', cv2.WND_PROP_TOPMOST, 1)

I'm on macOS.