There are plenty of Google hits on that topic, but so far I haven’t found one that gives the right answer. Here it is:
% dconf write /org/gnome/desktop/wm/preferences/focus-mode \
"string 'mouse'"
To switch back:
% dconf write /org/gnome/desktop/wm/preferences/focus-mode \
"string 'click'"
This works in Gnome 3.4, and I assume (but haven’t verified) that it also works in Gnome 3.6. However, given the recent developments in Gnome land, I will probably move away from Gnome altogether.
I went to XFCE4 shortly after GNOME3 ruined things and have hardly looked back.
Thanks!
Many thanks for sharing!
(I normally use KWin and have been looking to find how to mimic similar functionality on G3.)