Make mousing over a new window or screen change the focus to that window? [duplicate]
Solution 1:
I made a python script that does this. Check it out: https://bitbucket.org/sivann/mac-screenfocus/src
It focuses the last app that had the focus before the mouse left the screen. No mouse clicks happen behind the scene :-)
In my setup, the external monitor is on the left, it may not work in the reverse, let me know..