I I just picked up my new iMac Retina from the Apple Store. Awesome so far. I do have one minor annoyance. I use headphones about 50% of the time. I was expecting to be able to just leave them plugged in the back and option click on the volume icon to swap outputs. Thing is, internal speakers goes away when the headphones are plugged in. Is there really no easy way to switch without fiddling behind the computer?