When I change the sensibility of the launcher in the "Change Desktop Background/Behaviour", for the auto-hide mode, it doesn't really change. I can't appreciate the change. As a consequence it is hard to bring it up and annoying. Is it like that in all PCs or is it in the Apple Computers?
Install CompizConfig Settings Manager. Open it and edit
Ubuntu Unity Plugin: Set
Launcher Reveal Pressure to 1 (instead of 20 - default).
Be careful with changing settings in CCSM, though!