Modify, Adjust and Control Fan Speed (and Temperature) of Apple MacBook, MacBook Pro and Mac mini

»»»Modify, Adjust and Control Fan Speed (and Temperature) of Apple MacBook, MacBook Pro and Mac mini
Apple Intel-based computer such as Mac mini, iMac, MacMacBook and MBP (MacBook Pro) operating temperature of the processor can run to very high degree and hot. The hot CPU is due to the slow fan speed that are set to run up to a certain RPM (revolutions per minute) limit. CPU fan is important part of CPU cooler system, together with heat-sink, thermal paste and etc, so if the fan RPM speed is not fast enough, the cooling system can’t dissipate the heat emitted and generated by Intel processor fast enough, and the CPU may get too hot till affect its performance or worse, stop working altogether.

To check and monitor the Intel-based Mac OS X computer operating temperature, Mac users can download and install the freeware app CoreDuoTemp, which is also a menubar application with CoreDuoTemp Widget. Other than CPU operating temperature, CoreDuoTemp also displays indicators of CPU frequencies, CPU usage, and features multiple temperature unit °F, °C or K.

If your Mac system temperature is too high, Mac users can adjust and modify the fan speed to higher speed in order to make the Mac machine runs cooler at lower temperature. There are a few GUI (graphics user interface) based utility software that can help MBP and MacBook (and MacMini) users to control and adjust the speed of the fan cooler.

smcFanControl is one of the such fan speed control utility, to cool down MacBook (Pro). smcFanControl let users set the minimum speed for each built-in fan individually. However, in order to protect and note to damage the computer or notebook, you won’t be able to set the minimum speed to a rate which is under Apple’s defaults. So users can increase the minimum RPM speed of the fans to release and dissipate more heat and thus cool down the system. To change the fan-speeds, users need to authenticate with valid credentials of an user-account with admin privileges. Some note is that you need to check the “Auto Apply after Launch” option and add smcFanControl to Login-Items to auto apply your prefer fan speeds settings after restart, and in order not to lose the changed settings after standby, smcFanControl has to run in the background.


Another application is GPL-based open source software Fan Control from Lobotomo Software. Fan Control also modifies and adjusts the minimum fan speed. However, Fan Control can controls and adjusts the minimum fan speed by increment of 1 unit constantly depending on the current CPU temperature and user’s preset preferred temperature level automatically. Fan Speed also won’t modify the original automatic fan speed control for safety purpose.

Fan Control

While increasing the RPM speed of the fans in MacBook (Pro) can make the laptop and notebook cooler, however, it will consume more power and thus reduce the battery life slightly. And it could shorten the life of the fans too, and the noise of the fan will be louder slightly too.

Check out more computer, CPU and GPU temperature, voltage and fan speed monitoring and viewing software utilities.

By | 2016-12-09T08:41:20+00:00 December 9th, 2016|Categories: Utilities|Tags: , , , , , |16 Comments

About the Author:

LK is a technology writer for Tech Journey with background of system and network administrator. He has be documenting his experiences in digital and technology world for over 15 years.Connect with LK through Tech Journey on Facebook, Twitter or Google+.
  • Pingback: User Submitted Links()

  • Lauren

    What about setting a maximum fan speed? My Mac Mini almost constantly runs at 5400 rpm. Any suggestions?

  • Craig Mason

    Word of advice: you can't use both simultaneously.

    I downloaded both, and as long as the daemon for Fan Control is running, setting a higher minimum fan speed in smcFanControl will only result in a temporary (2-5s) speed boost before returning to the speed chosen by Fan Control, unless you repeatedly set the speed, but this must be done constantly. I haven't tried quitting the daemon and adjusting the smc speed, but I would guess that at that point, smc would work fine


    Plz sum1 Plz tell me-How Can disable this message:=-( Warning!! your Fan Tempture is too high) plz sum one plz tell me how can I disable it. After some time my Pc automatically sutdown…Plzzz PLzzz PLzzzzzz Helppppp!!!!Plzzzz

  • Fanatiko

    Si tienes windows y quieres regular lso ventiladores de tu macbook o macbook pro este es tu programa "

    Me he tirado un tiempecillo buscando y lo que encontre mejor es esto. Te remapea las teclas y demas pero bueno eso es lo de menos funcionan igual de bien o lo configuras a tu gusto i le puedes decir la velocidad del ventilador

  • A Mac Fan

    New iMac and Extended MacBook/Pro Fan Control Versions

    I've generated 2 new versions of Fan Control, one for the Intel-based iMacs and one for the MacBook/MacBook Pro which has some extended control capabilities over the original Lobotomo Fan Control version. For screenshots and (free) downloads (with source code) see:

    iMac Fan Control

    Extended MacBook/MacBook Pro Fan Control

    The iMac version allows separate sensors to drive the control of each of its 3 fans and the extended MacBook/MacBook Pro version allows fan-control via the CPU and/or GPU temperatures (useful if you play games on your laptop). There are also some other minor enhancements (see the ReadMe files).

    I've also tried to make it easy to adapt the source code for other systems … e.g., a version for the Mac Pro that uses different sensors to control different fans (or groups of fans).

    Hope these are useful to others.

    BTW, there are some Mac Pro versions available via this forum posting.

    • blue

      Extended MacBook/MacBook Pro Fan Control=
      You can’t download anything from here. Am I missing some steps here???

  • Night_Sailor

    Laureen. If your fan speed is constantly high, then someone modified your Mac Mini and forgot to plug the fan connector back in. With that cable unplugged it will run the fan at full throttle.

  • 3l cucho

    Do NOT get the product SMCfanControl. It only gave me problems. If you downloaded it, delete it immediately. It crashed my computer several times. I repeat, do NOT get SMCfanControl.

  • Wonkey the Monkey

    3l cucho may be describing his(?) actual experience, but nevertheless it is FUD. I have been using smcFanControl for more than a year with no problems. If you find that it does interfere with your system operations, it is easy to disable. Read the FAQs on the website before deciding for yourself whether or not to use it.

  • Spencer

    This program should not be posted. Most people who use computers don't know the slightest bit about the internal cooling systems. Only a handful might actually need or benefit from this. Professional and power users would rarely need this program, as everything is handled by an algorithm that has undergone extensive development and quality assurance testing.

    Inexperienced (and even experienced) people who use this program are more likely going to damage and mis-diagnose their computer than than had they not installed it.

    Word to the wise: your Mac's time-tested heat sensors and fan controllers will do a better job than a third-party freeware hack.

    • Tom Moore

      That sounds reassuring, but my Mac mini hasn’t heard about all that. I was experience intermittent outages of my display, and eventually noticed it seemed not to occur in the morning but after running the machine for some time. First I tried flipping it so it was in better contact with the desk, which helped but eventually it started again. So I got a fan control app and found that the fan was sitting at the lowest possible speed and the GPU was up toward 65C or even higher. As soon as I upped the fan speed, the temp. dropped down to the 40s and the display has been rock solid ever since.

    • blue

      Yes, you are right if you only use your default Mac operating system. But for people who re-use there Macs for a different OS like different Linux distro or Windows, the fan DOES NOT WORK AS IT SHOULD BE so we need an alternate app or package to regulate the fan speed since I believe in another post, the fan code is internal and can’t be hacked natively. Thus the app.

  • it works very fine with me.. I've using SMCfanControl for almost 2 years half, no crash, or what ever fault or problems on my MacBook!!!!

    This is a great application.

  • Pius Anderson

    Pls i need help, i converted my mac operating system to windows XP 2 . And now i can't drive my sound, bluetooth, web cam, ethernet, VGA. Pls what will i do and my system is always hot. I need help seriously this is my Email address.

  • raju

    mac mini connect to the inter net beam fiber system totaly run slow but what hapend i dont know