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Updated version of the 2016 Retina MacBook. Model A1534, EMC 3099. Now features faster Kaby Lake processors up to 1.4 GHz Core i7 with Turbo Boost up to 3.6 GHz and up to 50 percent faster SSD, and supports up to twice the memory.

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New style liquid indicators

Has anyone noticed the indicators are now black rather than white? I’ve heard a rumour they’re now inspected with UV or black light? Can anyone shed any light and maybe even show a triggered and not triggered examples?

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I’m also interested to know how they actually work now? I don’t see any difference , even with UV light

@mrancans : Have you found it out yet?


The formulation of the ink and base was improved. There is no visible difference between the old and the newer ones.


Hi Dan,

Thanks for the info.

They used to be white , turning red when come in contact with liquid.

Now they are black ... they don't turn red or anything?

Can you explain how they work now?



@racer ken - Magic! ;-}

I'm not a chemist, you'll need to find the supplier and ask them if you much know the magic.

For me it's not important, I don't look at them, I look for other signs which are more troubling corrosion and spill marks.


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It is true that they are inspected with UV lights. They made the liquid indicators more advanced because a lot of times they would be triggered without any liquid getting into the actual computer. for places like Huston Texas where it gets very humid, The indicators would get triggered and turn red just from the humidity in the air.

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Thanks for the quick confirmation! The new style does make sense I suppose! Any idea how they show up when triggered or not triggered? So far I've been trying and not getting a clear understanding as all appeared to look the same even though one unit was supposedly triggered?


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Martin Rancans sarà eternamente grato.
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