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My computers been randomly shutting down. I've noticed on activity monitor that cached files is almost always at 8GB+, even with no programs running.

Is this a normal value? If not, how do I diagnose what's causing it to run so high?

  • Can you post some images for detail. Which version of Mac are you running it on? Is it a Macbook. Macbook Pro, Macbook Air, iMac, Mac Pro, Mac Mini? – Melvin Jefferson Dec 20 '17 at 0:31
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Yes, that is a completely normal value.

The amount of cached files is not supposed to lower itself when you close running programs. There's no good reason for that to happen. The files will still be cached in RAM ready to be delivered to programs quickly when needed. If they are never needed, they will be purged from RAM eventually.

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    How do you mean that this is not an answer to the question? He asks whether the value is normal or not, and I answer that it is normal. – jksoegaard Dec 20 '17 at 0:28

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