How to control Mac fan speed?

In-built fan in your Mac prevent the computer from overheating. In this article, you’ll get to know how to control the fans and which apps you should install to do so.

By default, you can’t enable or disable the in-built fans on your Mac manually. Neither can you adjust their power or working regime. The fans turn on automatically to protect the device from overheating since it consumes plenty of energy during operation. As soon as the risk of overheating is over, cooling stops and you don’t hear the characteristic noise anymore. However, sometimes the fans might fail to switch on when expected or switch off after working for a while. In this case, try to control them manually to make sure your computer functions smoothly and productively.

The Reasons why Fans Might Overwork

Cooling sessions might last longer than usual for the subsequent reasons:

  1. The temperature of the environment. When it’s hot in the room, fans need more time to do their job.
  2. Dust on fans, vents, and other components of the system. If these tiny particles block the airflow, fans are exposed to extra workload.
  3. Too many apps working simultaneously, or certain apps suffering from bugs, or other types of overload. When the computer has to showcase its full capacity, it becomes prone to overheating.
  4. Modified settings of the System Management Controller or a temperature sensor out of action. To eliminate the problem, set new parameters for the SMC or replace the sensor.

Macs don’t use notifications, light indicators or any other signals to let you know that the fans are adequately performing their duties. The only symptom that you should rely on is the distinctive hum. You might want to install third-party apps to check whether the fans are operating properly or need your manual intervention.

Functionality of Third-Party Apps and Reasons for Installing Them

Apps for managing the fans have intuitive interfaces and display meaningful data in a comprehensive and well-structured format. They perform the following operations:

  1. Show you indicators from diverse sensors, assess the fan’s speed, analyze cooling patterns.
  2. Evaluate whether the computer is working within a normal temperature span: from +10°C to +35°C. This can be calculated due to the operating speed of the fans.
  3. Verify the integrity of temperature sensors and low-level components with data logs of fan speed. This becomes essential after replacing components.
  4. Alter the fan speed so as to minimize the noise for a short while. This comes in especially handy when working at night or in public places.
  5. Detect an issue with the hardware and collect insightful data that will help IT specialists to solve it.

It’s impossible to say that a certain speed range should be regarded as “ideal” for a certain computer. The velocity should flexibly adapt to the combination of external and internal factors. When deciding whether a certain speed is “normal” or not, you should rely on objective figures rather than your own gut.

Which Apps to Select to Manage the Fans

Among the numerous and diverse apps available in the AppStore, Macs Fan Control deserves customers’ attention for its remarkable informativeness and user-friendly interface. As soon as you launch this one, it will start measuring the fan’s speed and temperature. If your aim is not only to check these parameters but also to make the fans accelerate or decelerate, you should download an additional utility.

The fans are grouped in the left pane of the program. Their rapidity is measured in RPM (revolutions per minute). In the right pane, you’ll see the temperature of thermal sensors. To alter the required parameters, push the Custom button. To indicate the RPM value by hand, resort to the Constant RPM option — after that, sensor indicators, temperature of the computer and the environment won’t affect the operating mode of the fans. By contrast, the Sensor-Based Value option enables you to set a temperature at which the fans commence to work more intensively.

The free version of Macs Fan Control should be enough for you. Upgrading to the Pro version makes sense only if you are planning to apply custom fan presets.

As an alternative to this app, you might consider TG Pro. As a supplement to measuring the fans speed and the temperatures, it also monitors battery health and other meaningful parameters. The hardware inventory is located in the left pane, on the right you can see the sensors. The fans speed is displayed in a separate area, plus there is a helpful diagnostics area. Once you detect a problem, press the Help button, and it will provide you with valuable recommendations.

As it was mentioned above, the fans might overwork if too many apps are running simultaneously or if one of the apps on your Mac has a bug. To prevent the computer from overheating, you should consistently monitor its security with the help of an antivirus. MacKeeper, for instance, will proactively defend your device from viruses and malware. In addition, it will make sure the computer has enough free disk space.

MacKeeper will detect junk files, duplicate files, unused apps and other unnecessary items and gently remove them, leaving useful components unaffected. After that, there should be no reasons for overheating.

Some More Tips on Managing The Fans

The more intensively the fans work, the more noise they produce. During a cooling session, the computer might decelerate. These hindrances can’t be avoided — just wait until the temperature comes back to normal, and you’ll once again be able to enjoy the quietness and the outstanding productivity of your device.

Once you discover that the fans are malfunctioning, don’t try to fix them yourself. It could have been possible on older Apple computers but the latest models are too complicated in this aspect.


With fans working properly, even not a brand new Mac will remain quick, smart and productive. Don’t postpone installing an app that analyzes the fans functioning just because you don’t consider yourself to be a geek. Protecting the fans from unwanted strain is just as crucial as protecting the computer from thermal overload. Your task is to timely detect trouble with fans if it ever occurs. To solve it, resort to professional help.

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