The new Retina MacBook Pro has plenty of water sensors

5 July, 2012 - Killian Bell
MacBook Pro with Retina display

Inside almost all of Apple’s electronic devices, the Cupertino company places tiny little stickers that change color when they become moist. It does this so that when you drop your iPhone into a pint of water, you can’t wait for it to dry out and then tell Apple’s Genius Bar it stopped working all by itself.

In the new MacBook Pro with Retina display, Apple has gone overboard with the moisture sensors to ensure water damaged machines don’t slip through its net. Whereas its previous machines contain around eight moisture sensors, Hardmac notes that the new MacBook Pro contains ten.

Red stars indicate sensors hidden under cables or components. Blue dots indicate sensors visible when the bottom plate is removed.

This is likely because the new machine is a real pain to repair. Apple’s design process requires components like the RAM –¬†which is user-repairable in most of today’s machines – to be soldered to the logic board, so the only way to replace them is to replace the entire logic board – typically the most expensive part in a notebook.

With that being the case, the Cupertino company clearly wants to ensure that when users damage their devices accidentally, it doesn’t repair them for free under their warranty, which only covers component failure. That’s why when you take a broken down device to the Genius Bar, the first thing Apple’s technicians do is check the moisture sensors for any sign of liquid damage.

Apple insists, however, that these moisture sensors are triggered by liquid only, and that humidity in warm climates will not affect them.

[Via: Macworld UK]

About the author

Killian Bell is a freelance journalist based in Worcestershire UK. In addition to writing about all things Apple, he's one of the co-founders of the football site TitleTalk. You can follow him on and Twitter.
  • Neilster

    “Apple insists, however, that these moisture sensors are triggered by liquid only, and that humidity in warm climates will not affect them. ”

    Yep i had this issue with Apple , I have never split nor used any form of liquid cleaners to clean my mac. Sadly i was one of those unlucky people who got a mid 2010 with a faulty graphics card which is covered under a extended warranty.  The mac store ran all the tests and told me i needed new logic board and it was covered . 3 days later they said i had water damage and would have to pay over 900 to get it fixed.

    I got a second opinion and was told that climate change / humidity can easily trigger the sensors . But mac will not accept it even though the know its true.

    I might add further that my mac works fine as long as dynamic Switching is off. If was water damaged it would have totally crapped out by now.