Most of the time, you donβt need to worry about your Macβs temperature. Your laptopβs built-in fans will go faster when your Mac starts to get hot, and slow down once the temperature returns to normal, all with zero interference from you.
However, there are some benefits to manually adjusting your fan settings.
Whenever your Macβs temperature starts to rise, macOS automatically throttles your CPU to give the temperature a chance to return to normal. By configuring your fans to kick in at lower temperatures you can push your Mac harder, without macOS stepping in and throttling your CPU. This performance boost comes at a cost, as your fans will be noticeably louder, which may be difficult for some users to deal with, or could even be embarrassing if you’re using your Mac around other people, such as in an office or cafe.
Alternatively, if you find the sound of the fans grating, then you can turn them down a notch. As ever, thereβs a downside: your system will get hotter, quicker, so macOS is more likely to throttle your CPU and make your Mac run noticeably slower, even when youβre not doing anything particularly strenuous.
In this article, Iβll show you how to manually configure your fan settings, using the free Macs Fan Control application.
Donβt damage your Mac!
Regardless of whether youβre cranking your fans up or down, itβs important to monitor the temperature of your CPU and other components, to make sure your manual tweaks arenβt damaging your system.
Running your fans at maximum speed for a significant period of time can damage your Mac, and if you push the CPU too hard then itβs possible your Mac may start to overheat, even with the fans at full blast.
At the other end of the scale, if you tell macOS to wait too long before activating the fans, then your Mac may be nice and quiet but it may also be internally burning up!
When adjusting your fan settings, itβs best to err on the side of caution and perhaps consider making small changes, slowly, just to make sure thereβs no negative side effects.
Manually increase, or decrease your fan settings
In this tutorial weβll be using the free, third party Macs Fan Control app, so the first step is getting this application setup:
- Download the latest version of the Macs Fan Control app.
- Unzip the resulting ZIP file.
- If Macs Fan Control is going to work correctly, then it must be located in your βApplicationsβ folder, so grab the app and drag it to your βApplicationsβ folder.
- Launch the Macs Fan Control app, and enter your admin password when prompted.
This application will now list all of your Macβs fans and their current temperatures, and will display two buttons for each fan:
- Auto. This is the fanβs default settings.
- Custom. This allows you to set a specific target temperature or RPM (revolutions per minute) which is the number of revolutions your Macβs hard drive will complete in a single minute.
To override a fanβs settings, select its accompanying βCustomβ button. In the subsequent window, you can:
- Manually set a constant fan speed, by selecting βConstant RPM valueβ and then using the accompanying slider to increase or decrease the RPM.
- Set a specific temperature, at which point the fan will start to run faster. You can also set the temperature where the fan will hit its maximum speed.
- When youβre happy with your changes, click βOK.β
You should immediately hear a change in your fan speed. Spend some time performing various tasks, to see whether your changes have the desired effect – and to check whether you can put up with the extra noise or heat coming from your machine!
While testing your changes, you can use the Macs Fan Control app to monitor the temperature of various components, to make sure youβre not causing any damage to your system. In particular, you should keep a close eye on the CPU Core temperatures, as these are most likely to be affected by changes to your fan settings.
If at any point youβre concerned about your Macβs internal temperature, then you should immediately restore the default fan settings:
- In the Macs Control app, select the fan in question.
- Select its accompanying βAutoβ button.
If youβre happy with your changes, and want to continue using them even after rebooting your Mac, then:
- Click the βMacs Fan Controlβ icon in your Macβs menu bar.
- Select βPreferencesβ¦β
- In the subsequent window, make sure the βGeneralβ tab is selected.
- Select βAutostart minimised with system.β
- Click βClose.β
Worried about overheating? Easily monitor your Macβs temperature
The Macs Fan Control app displays live information about the temperature of all your Macβs core components. If you make any changes to your fan settings, then you could keep this app running in the background and use it to keep track of your Macβs temperature – but this requires you to keep switching back to the app!
If you want an easier way to track your Macβs temperature, then you can add this information to the menu bar. Unfortunately, Macs Fan Control can only display the temperature of a single component, but this can still give you an indication of your Macβs general temperature, or help you keep a closer eye on a component that you know is particularly susceptible to overheating.
To add a temperature readout to your Mac’s menu bar:
- Select the βMacs Fan Controlβ icon from your Macβs menu.
- Select βPreferencesβ¦β
- In the subsequent window, select the βMenubar displayβ tab.
- Open the βSensorβ dropdown and choose the sensor that you want to monitor; a temperature readout for that sensor should now appear in your Macβs menu bar.
Before you go
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