focus follows mouse for OSX
Want to have the window focus follow your mouse (i.e. without clicking)? Tough. You can't. At least, not for native quartz apps. You can get the OSX X11 server to do it for X11 apps via the following command:
defaults write org.x.X11 wm_ffm true
But as far as I can tell from googling, it's impossible to get quartz to behave this way. Which SUCKS!