MacBook Pro 2012 Retina - fans constantly on high speed without cpu load

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Level 2

190 points

MacBook Pro 2012 Retina - fans constantly on high speed without cpu load

I never had problems with my MacBook Pro's fans - until now.

Suddenly, without any reason, the fans kicked into high gear and have been running full speed - even if there's only a 10% CPU load, even when all applications are closed.

How you resolve this? Resetting the NVRAM? Resetting the SMC?

What is the reason for this malfunction?

MacBook Pro with Retina display, macOS Sierra (10.12.6), 512 Gb SSD, 16 Gb RAM,

Posted on Mar 1, 2018 12:38 AM

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Answer 1

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dominic23

Level 10

83,910 points

Mar 1, 2018 1:03 AM in response to Ocean 17

Reset SMC. Choose the method for “If the battery is non-removable”.

https://support.apple.com/en-us/HT201295

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Answer 2

Ocean 17 Author

Level 2

190 points

Mar 1, 2018 8:28 AM in response to dominic23

Thanks, Dominic.

This morning the fans stayed quiet. But when they start up again I now know what to do - bookmarked your link.

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MacBook Pro 2012 Retina - fans constantly on high speed without cpu load

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