In most cases, everyday use of a MacBook Air or MacBook Pro should be relatively silent.However, sometimes the high-frequency fans in these laptops turn on and create ear-piercing noise.Why your MacBook fan is so loud and how to reduce mac fan noise? Here are a few possible causes, as well as possible ways to eliminate them.
Why do fans usually unwind
First, let’s determine why your fans usually spin up.When the components of your MacBook, especially the processor, work intensively, they release heat as a by-product.Fans suck out hot air, and cold air enters the system, preventing the computer from overheating.
While this is normal when you play video games or otherwise load the system, it shouldn’t happen when the computer is idle, used to browse the web or write a document in a word processor.Fans can be switched on for a short time at low loads, but should not remain switched on.If so, you need to investigate further.
While you may not be using a MacBook to do heavy tasks in the foreground, there can be a lot of interesting things going on in the background.It is during downtime that macOS can do some household chores.For example, Spotlight search in macOS is a common culprit because it indexes the contents of your Mac when you’re not using it.
You can easily check which programs and processes are using your CPU resources by opening the Activity Monitor.This can be found out in one of two ways:
- Applications > Utilities > Activity monitor.
- Press the command combination + space to open the Spotlight and the Activity monitor type.
If you want to learn more about using Activity Monitor, check out The Activity Monitor guide & How To Use It.If you want to know how to kill these CPU-wasting processes, then 5 ways to force exit from applications on your Mac is what you need.
Do not block the ventilation openings
With the exception of the new MacBook Air M1, all MacBooks are equipped with air vents.
On MacBook Pro devices, they can be located on the sides and back of the computer.Since the vents are not located on the bottom, you will not block them when the device is lying on your lap.
However, if you put the laptop on a soft surface (pillow or bed), you can block the rear vent and force the fans to rotate harder, since there is not enough airflow to get hot air out of the system.
In order not to block the ventilation openings, you can use a “lap table”.There are many options to ensure an optimal surface that will never block the vents.
Check the air vents for dirt
In addition to blocked ventilation openings, there may be internal obstacles preventing the free passage of air.Cleaning the air vents on your MacBook may be the solution to the problem.
Keep the following tips in mind when cleaning air vents:
- To clean the vents themselves, a small soft brush is suitable.
- You can (carefully) use a dust collector with compressed air.Follow the attached instructions and do not rotate them off-axis during use.They can emit a cold stream of gas and cause condensation to form inside the computer or in its air vents.
- Try using a keyboard vacuum cleaner with a small brush attachment to remove dust from the vent.Be careful when using a powered device near sensitive computer equipment.
Consider cleaning inside the MacBook
Over time, dust can accumulate inside the MacBook and clog the fans, making them less efficient.Open the laptop to clean it from dust by following the tips below.
- If your MacBook is still under warranty, contact a certified repair shop for maintenance.
- If you want to do it yourself, use the iFixit Essential Electronics Toolkit or at least the P5 Pentalobe screwdriver for the Retina MacBook Pro and MacBook Air models.Here are a few basic steps, like getting inside the 2019 MacBook Pro:
- It is necessary to unscrew the six toothed screws from the bottom panel.
- Using the blades, disconnect the left and right sides of the panel.
- Slide it in properly so as not to crumple the lid.
- Carefully remove the dust accumulated in the blower fans.
Find a YouTube video for your specific model to learn how to open a laptop and clean the fans.
Resetting the system control controller
Sometimes the MacBook fan control system may fail.This can be fixed by resetting the System Management Controller (SMC) settings. The exact method of how to do this depends on the model.
Resetting SMC on Macs equipped with T2
If you are not sure if your Mac belongs to the T2 model, use Google to search for the name of your model and the term “T2”.For new MacBook models with T2 security chip:
- Turn off the computer.
- On the built-in keyboard, press and hold the Zero control button, the left option right Shift key for seven seconds.
- Without releasing any of these buttons, hold the power button down.
- Wait another seven seconds and then release all four buttons.
- Wait a few seconds, then press the power button as usual to turn on the computer.
Resetting SMC on Mac computers without T2
Most 2017 MacBooks or earlier models do not have a T2 chip, so a different reset method is used for them:
- Turn off the computer.
- Using the built-in keyboard, press and hold the Left Shift, Left Control, or Left option keys.
- While holding all three keys with your left hand, press and hold the power button.
- Wait 10 seconds.
- Release everything, wait a few seconds and turn on the Mac as usual.
Resetting SMC on a Mac with a removable battery
Follow these steps to reset SMC on a Mac with a removable battery:
- Turn off the computer.
- Remove the accumulator.
- Hold the power button for 5 seconds.
- Put the battery back in place.
- Turn on your Mac.
Updating macOS may be the solution to the problem
In the past, some MacBook models have fallen victim to fan errors when it reacted incorrectly to different temperature levels.If your fan is having problems after a recent update, you might want to consider downgrading the macOS version.Also, if there is an update pending, install it and see if it solved the problem.
Well, if we summarize all this
After all this, we hope you now have a MacBook that is a little less prone to making hurricanes without a good reason.
Learn more about MacBook fan noise and ways to fix the situation in this article.
If it’s time for you to upgrade your laptop, consider one of the latest M1 MacBook Air or MacBook Pro models.They use Apple silicon, which works at much lower temperatures