[UniMacTech] Disable iMac internal speakers?

[Mark Szota]

Hi folks,

Is there a way to disable an Intel iMacs / Mac Mini's internal speakers, 
such that all audio output goes through the headphone jack? Given most 
of our Macs are in a classroom environment it would be nice if the 
internal speakers were turned off at all times, such that if students 
did want to hear audio output they would have to plug in headphones first.

 From what I've discovered via google, the only way seems to be plugging 
in some kind of "jack" into the headphone output that fools the Mac into 
thinking headphones are connected, thus it disables the speakers 
straight away. Whilst this a cheap and nasty fix, it's not particularly 
foolproof.

Any better ideas?

Cheers
Mark

-- 
Mark Szota

Campus IT Co-ordinator
Berwick School of IT
Monash University
Clyde Road, Berwick, Victoria, Australia, 3806

Tel: +61 3 9904 7122
email: Mark.Szota at infotech.monash.edu.au