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Overheating fans on 2018 MacBook Pro

I've a 2018 MacBook Pro which still works perfectly but the fans gets to loud trying to cool it down when it overheats, asking of a possible solution for this problem.


[Re-Titled by Moderator]

MacBook Pro 13″, macOS 15.1

Posted on Nov 21, 2024 6:11 AM

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2 replies

Nov 21, 2024 8:30 AM in response to ebuke

You can see what is driving the processors using Activity Monitor, and quit/restart those apps.


Activity Monitor User Guide for Mac - Apple Support


With Intel-based Macs, fans are a fact of life. As I type this on my 2019 16" i9 MBP, the fans are just slowing down to a reasonable speed after being >5000 rpm when the CPU temp spiked up to 81 °C.

Nov 21, 2024 8:56 AM in response to ebuke

...asking of a possible solution for this problem.


It's not a problem but rather normal operation. This is what is happening, by design:

1) Fans run all the time, but their slowest speed is very quiet.

2) There are thermal sensors located on or near most internal components of the computer.

3) The sensors act like the thermostat in you house, If the sensors detect too much heat, they signal the fans to speed up.

4) Max fan speed can, depending on the Macbook Pro model, be as fast as 6000rpm.


Fans running at high speed are a direct indication of too much internal heat generated by whatever activity you are doing with the computer, or a workstation or work-flow habits that are blocking air intakes, both of which you can control.


If you disable the fan system, the computer will either not start or kill itself.


Most 13-inch Macbook Pros have but one fan and no side vents for extra cool air intake. Air is taken in through the keyboard and at one end of the hinge area and exhausted at the other end of the hinge.


If any of those are blocked you WILL overheat the computer and cause the fans to be noisey.


—Gaming can create more heat that a compact notebook computer can ever dissipate.

—Some web pages create more heat than they should. If I leave one particulater selling site open in the background on my Macbook Pro 13, internal temps jump from "normal" of about 40C to 75C in just over a minute. When I close the selling page, the temps go back down.

—Useless anti-virus and so-called "cleaning" apps will make your computer run hotter.


If the fans are running fast with no apps running and none of the airways blocked, you can start with an SMC reset. Instructions are here, but be sure to understand which Macbook Pro you have before doing the reset:


Reset the SMC of your Mac - Apple Support


Overheating fans on 2018 MacBook Pro

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