Hello all. I own a late 2007 MacBook (white) and i was just googling for optical digital audio output because i'nve noticed the new MacBooks has this red light coming out from the audio out port. I found this apple's page which claims that my MacBook model does have this feature too: http://support.apple.com/kb/sp12 How can it be? I never found anything like that in the sys prefs and as far as i know, i should be able to see the red light coming out from the output audio port, right?! Please help... Thanks.