OS X: Mouse pointer behaves strange if moving from and back to fullscreen space

[FrodeSolheim]

If you are using FS-UAE in fullscreen on OS X, and switch "virtual desktop" with e.g. Ctrl+Left, then the Amiga mouse pointer may start to behave strangely when returning to FS-UAE. In particular, you may not be able to move it all the way to the top (and it'll look like the pointer is hitting an invisible border).

One workaround to fix the issue when it occurs is to use F12 + g twice (to ungrab and grab the mouse pointer).

This is probably not a bug in FS-UAE, but rather an issue with SDL2 + OS X. But it is possible it could be worked around automatically in FS-UAE by automatically ungrabbing/regrabbing focus if it can be detected that application has lost + regained focus.

[mdbergmann]

Same issue here.