All this "mooing" from a mac can only mean one thing! The long forgotten
Dogcow has been incarnated inside the Macbook!
http://en.wikipedia.org/wiki/Dogcow
Researchers have translated the mooing from the dogcow or "Moof" sound into the following:
"I need to be let outside to pee."
Apple has agreed to have a exorcism done on all effected macbooks to release the Moof.
Rest in Peace Dogcow, we will always remember you.
http://clarus.chez-alice.fr/ENGLISH/index.html