With most laptop products, the cooling fan is an indispensable part. No matter how expensive a MacBook is, it’s no exception. When your laptop gets too hot inside, the fan will start to work to cool it down. In fact, the Mac has a thin, light, and monolithic design, so the ability to dissipate heat is worse than other laptops. Therefore, you will find that its cooling fan works more often. However, if your fan runs for a long long time with loud noises, there could be other issues. So in this article, we will show you how to fix Mac fan noise.

Check The Running Apps and Browser

The more apps and browsers you leave running at the same time, the more likely that the device will overheat. In this case, your MacBook’s fan will have to run constantly at a high speed. If overheating persists for a long time, your Mac’s fan may even reach its limits and make some loud noises. Therefore, you should reduce the number of apps that your Mac is running in order to prevent your fan from getting too hot.

To see which apps are taking up the most CPU, open Activity Monitor, click on the CPU tab. Now You will see a list of running apps. If you see any apps that are not essential, you can close them to see if that stops the fans. Click on the process and then click on the X above to stop it.

In practical experience, graphic heavy apps like Photoshop or iMovie can take up a big load of resources. You should close them if you no longer use it. Chrome usually takes up more RAM than Safari does, so you should try switching to a different web browser. When you want to listen to music on Spotify or Apple Music, you should consider using them on an iPhone instead of a MacBook. These are great ways to reduce system overload on your Mac and prevent overheating.

Free-up Your Mac Storage

A low storage space can also be a reason for the fan noise on your Mac. A nearly full SSD drive will have a much slower write and read speed. Therefore, it will put more pressure on your Mac’s CPU. When the CPU is overloaded, your computer will heat up constantly, thereby causing the fans to spin even harder and make noises.

You can instantly find and delete those large, storage-consuming files on your Mac. Or you can follow this guide to clean all the junk and cache files for more storage on your Mac. You can also buy an external storage drive to reduce the overload for your hard drive.

Make Sure The Air Can Circulate

All the Mac models have some vents on their bodies so air can circulate and keep your device cooler. In some cases, these vents can be blocked due to your Mac placement. For example, some users have the habit of placing their mac on a pillow or a cushion when using. This is not only dangerous but also prevents the air from circulating around, thereby causing the Mac to heat up rapidly. And again, if it is overheated, your Macbook’s fans will be forced to run at maximum capacity, thus causing noises.

Using a stand for your Mac will be the solution in this case. A stand will raise the Mac off the flat surface and allow the air to circulate underneath it. There are many stands on the market nowadays, but we highly recommend using the Apple’s MacBook Stand.

Clean Your MacBook Cooling Vents and Fans

Sometimes the vents can be blocked by dust and dirt. You can clean the building-up dust easily with a hoover. However, if you don’t clean it frequently, the dust builds up inside your Mac and clogs up the fan, which leads to abnormal noises.

In this case, you will need to open up your Mac and clean the fans. By using a tiny Phillips-head screwdriver, you can remove the bottom panel of your MacBook to clean out any dirt and dust that have been there for a while. In addition, you can use a can of compressed air to blow away any debris or use a small piece of lint-free cloth to wipe them away. Make sure that the fans, the vents, and the back of your Mac are cleaned. This will make a clean passage for maximum airflow

If you are not very good with screwdrivers, you can take your MacBook to the nearest Support Center for cleaning services.

Reset SMC ( System Management Controller)

If your MacBook’s fans keeps spinning and making a loud noise, you can try resetting SMC. The SMC is responsible for controlling low-level functions on your Mac, including the cooling system. Different Mac models will have different SMC resetting methods. You can check out this post for more details

Test Your Fan

There is a chance that the fan noise on your Mac is happening due to some issues with the cooling fan itself. Luckily, all MacBook models now have a hardware diagnostics tool.

All you need to do is Plug in the MacBook charger, remove all peripherals, restart the device, and hold the D key to open the hardware diagnostic program.

Follow the on-screen instructions to run the test. A standard test normally takes a few minutes and will report any hardware issues. You can also go for an extended test, which may last for hours.

If there are any issues with your hardware, the tool will let you know under the form of reference codes. You can check out this Apple Support page to know more about the codes. There are three codes, which start with “PFF”, related to your Mac’s fan. If you get one of these codes in your test result, there may be a problem with your cooling fan. In this case, you should contact Apple Support or visit the nearest Apple Center.

And that is our guide on how to fix the fan noise on Mac. If you have got any questions, let us know in the comments.

This article is an updated version that reflects new methods for fixing Mac fan noise. You can check out our original Mac fan noise article here.