Mac terminal command fan speed

How to manually set your Mac's cooling fan speeds

Setting it at the highest speed, rpm, is not a good idea as it uses more juice and shortens your fan life. Is your fan running non-stop at high speeds even when the computer is cool? Paste this line in the command prompt and hit enter;. The number 60e0 at the end is rpm. Change this to the speed of your choice 3e80 is rpm.

Unfortunately this command has to be run every time you log in.


To get around this easily open up Automator. Save your work flow as an application.

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And your good to go! If you've purchased one of Apple's inch Retina MacBooks, take heed: your power cable could…. How To.


Not to say this doesn't happen with the other models, or laptops in general, but this happens naturally with the newer MacBooks. There is a way you can control your fan's speed and power to prevent this from happening, and it's completely safe if used properly , and easy to do. So, let's get to it. Macs Fan Control is one of many fan controlling programs for Mac like smcfancontrol and Fan Control 1.

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Once download, unzip the file and move the app to your Applications folder. Double-click on the application to open it, and immediately, you'll see its icon appear simultaneously in your Mac's menu bar on the right.

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This program's main window has all the information you need to understand what you're going to do, and what your limits are. Just glancing at the fans and sensors information will give you a good idea of whether or not something is heating up a little too much. Now that we understand the information given to us, let's see how we can tweak it. Go to the left side of the window and double-click on the fan you want to affect. In this example, I'll change the left fan, but you should change both fans to the same speed when doing this procedure.

You will be presented with your options when you double-click a fan.

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The default is Automatic , but to change your fan's speed, you'll want to select Constant RPM value instead. You can either use the slider, or type your own custom speed. Usually about to RPMs above your current is as much as you should consider—I changed mine to You'll see that your value will begin to increase to the value you just set. And, your Control will no longer be on Auto , it will change to the constant value you chose.

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Your Mac will be begin cooling if you selected the right temperature. You will be able to hear the fan at higher rates, but it won't be doing any harm to your system.

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Remember to change your other fan to the same speed, so they're running evenly. Do not leave your Mac running with this fan speed longer than the time you're using it.