After you use MacBook Pro for a while, and if its fan is always on, gets noisy, or deals with other problems like invariable fan speed, there are chances that some background processes might be eating up additional hardware resources such as CPU and RAM of your Mac. Even when the hefty programs are set to initialize at the time of the bootup to make the fan run faster, thus makes a lot of noise. Here are some tips and tricks you can try to fix your MacBook fan always on, loud or not working.

What To Do If Your MacBook Fan Always On

While a MacBook fan is always on, it should not be excessively noisy or running at a high speed every time you use your Mac. If it always runs at maximum RPM (usually about 5500rpm on a MacBook), it means that there is software running on your Mac stressing the CPU or GPU. Here are some methods to help you

Method 1: Use Activity Monitor

  • Launch Activity Monitor

On your Mac, click on Go from the Menu Bar, select Utilities and double-click on Activity Monitor to open Activity Monitor. From here, you will see the CPU tab selected by default. Next, find out all the active apps and processes consuming the number of resources (processor on the CPU tab) of your computer.

  • Quit the app

Now, check for the apps that are eating up more CPU and RAM amount, click the Force a process to quit icon from the Activity Monitor, and select Force Quit. While you can also right-click on any active app from the Dock and click on Quit, you’re left with no option other than using Force Quit when your MacBook fan is too loud.

Method 2: Remove Startup Apps

Sometimes, one of the reasons that make your MacBook fan to be always on is the startup apps. If there are too many running when you first log into your device, then it will consume a lot of CPU and RAM, which cause the fan to work hard and make noise.

Click on the troublesome user from the left pane, select Login Items tab and choose an unnecessary app from the list, and click the – icon to remove the selected apps from the list. The chosen apps would no longer automatically open when your computer starts and you log into, thus reducing the CPU and RAM usage and reducing fan noise.

Method 3: Disable Flash in the browser

Flash is now deactivated by default in Firefox browser. If you use Chrome, you can use Flashcontrol plugin to disable Flash. Flash can be seen as the biggest causes of CPU/GPU stress, and will undoubtedly increase your Macbook fan speed as it is intensive on hardware. So, you should turn it off on your browser.

Method 4: Restart your MacBook Pro

If the fan continues to run at a high speed, do a restart for your Mac

Method 5: Reset SMC and PRAM

If none of the above methods helps you, you should try resetting the SMC and PRAM. The SMC reset. Find out how to Reset the SMC and the PRAM.

How to Fix a Noisy Macbook Fan

If your Macbook fan causes the noise most of the time, and it is running faster than it should be, there might be something triggering it to do this. Here are some things you should do

  1. Ensure the fan is not clogged with dust

Fans will get noisier when it needs to run faster, and the reason is due to its clogged with dust. If there is too much dust, it will reduce the effectiveness of your Macbook fan. Cleaning your Macbook fan is not as difficult as you think, you can do it without opening your Macbook. All you need us to use a can of compressed air and then push the air through the vents at the back. That’s easy!

  1. You are connecting your Mac to external displays

Your MacBook fan would get noisy if it’s connected to an external display, especially high resolution one since the Graphic Card on your Mac will need to work harder, which causes the fans noise. The solution here is to simply restrict connecting your MacBook to external displays or lower resolution when connected. If you really need high-resolution external displays, you need to upgrade your MacBook then.

  1. Replace the fans if necessary

Old fans will absolutely get louder than new ones. If your fans are noisy all the times, even when you are not running any apps, it means that the fans have worn out.

Control Fan Speed on Your MacBook

By default, Apple’s software controls the speed of the fans. It will pre-determine when the fans run high speed if the CPU/GPU is getting hot. However, Apple does not provide any interfaces to manually control the fan behavior. To do so, you need the help of third-party utilities. There are a few great third-party utilities like smcFanControl or Fanny if you are much about temperature.


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