My MacBook Air 11″ has been creaking a lot lately when I pick it up, the noise has gradually increased and I finally discovered the reason why: loose screws. I’m not sure what caused the screws to become loose, but I do bring my MacBook Air almost everywhere with me so this could be a gradual loosening from constant use and movement.
The solution is obviously to tighten them up again, but Apple now uses a more unique screw type, the pentalobe, which prevents your average household screw driver from working. Luckily you can buy a Pentalobe screwdriver on Amazon for $5 to a buck and considering they work on the iPhone 4 and MacBook Air, it’s not a bad purchase. The expense is further justified by the fact that it’s very hard to replace a single screw, so if you lose one you’d have to have to spring $50 for a full set from a company like iFixIt, who also sells the Pentalobe screwdriver for about $13 (image up top is from them too).
Moral of the story here: if you hear creaky sounds and squeaks coming out of a MacBook Air when it’s picked up, check the screws.