Having the constant whirring of a noisy fan can provide an annoying background hiss to your working day. However, they are also an indication that the CPU in your Apple Mac machine is overworked or there is something else that your machine is struggling to deal with. 

Anti-Malware programs could be one of the causes. They are meant to clean your Mac but often will make your fans run constantly and cause more harmful effects to your mac than you had already! ☹  Don't use those ‘so-called’ cleaning apps, they're a waste of resources and some turn into malware after a while, especially if you don’t pay after a ‘trial’ period! 

So how do you resolve a noisy fan issue on your Apple Mac? Firstly, if you have a desktop or a notebook/laptop with a removable battery, try a hard ‘reset’:

·      Shut down your machine

·      Remove the power cable and the battery if it is a laptop, or just remove the mains power cable if it’s a desktop machine (contact the MacHub if you need help with this)

·      Hold the power button down for 10 seconds and then release

·      After pausing for a few seconds, re-install the battery and then re-attach the power cables 

·      Turn on your Mac again by pressing the power button.

If this doesn’t work, you can resolve some of these issues by resetting the System Management Controller (SMC). Note that this process is designed for older, pre-Apple T2 Security Chip Mac’s. We will be addressing machines with T2 chips in the next article.

The following SMC process is for notebooks/laptops with non-removable batteries. This includes MacBook Airmachines up to 2017,MacBook Pro machines from mid-2009 to 2017and MacBookswith the exception of the Mid-2009 13” MacBook.

If you have a notebook/laptop, you can reset your SMC using the following steps:

·      Shut down your machine

·      Then simultaneously hold down the following 4 keys (Control, Option, Shift and the power button). Your Mac may turn on but then it will shut off

·      After 10 seconds release all 4 keys

·      Then press the power button to turn on your machine.

The following SMC process is for notebooks/laptops with removable batteries. This includes all MacBooks and MacBook Pro's up to early 2009 and mid 2009 13" MacBooks

·      Shut down your machine

·      Remove the power cable

·      Remove the battery (contact the MacHub if you need help with this)

·      Hold the power button down for 5 seconds and then release

·      After pausing for a few seconds, re-install the battery and then re-attach the power cables 

·      Turn on your Mac again by pressing the power button.

Use the following SMC process if you have a desktop computer:

·      Shut down your machineand remove the power cable

·      Unplug any USB devices

·      Press the power button and hold for 10 seconds (without any power cables attached) then release

·      Pause for 10 seconds then re-attach power cable and any USB devices

·      Turn on your Mac again by pressing the power button.

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