Apparently that did it. Maybe I should do that once a year. The last time I cleaned the computer was last year when I put more memory in. Also, I would verify that this is not the issue: I had an older Mac Pro that was constantly running its fan, and it turned out it was just a dusty graphics card. I had the same problem I checked all sorts of stuff, including looking into the housing. It was more or less dust free. A solid wall of dust even though, every 6mos or so I'd wave the vacuum around the computer. Once I pried off that layer of compacted dust from the graphics card fan, the machine is running silently!
There's more info on the Apple support boards , including further steps you can take if this doesn't work. Also, there's a thread about what settings will be nuked when you reset the PRAM.
After reading the responses I used my compressor to blow the dust out of my Mac Pro and it solved the whistling problem. I was also amazed by the about of dust the housing had gathered over the years. Thanks to all who posted responses to this question. We have a bunch of Mac Pro's in office. One of them in a rather quiet room no less started making a persistent high frequency continual buzz. It was definitely a moving components, because shutting the computer down would stop the sound.
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Tracing the sound eventually led me to the video card. Despite how low it was spinning, the video card fan was spinning nevertheless. When I would press my finger onto the middle of the fan forcing it to stop spinning , the sound went away. At that time the computer was highly highly mission critical, so downtime more than a few minutes was not a good idea. The Apple Store had none of our video cards in stock, and they were unwilling to take my word on the diagnosis and order it.
So, I engineered a 0. I took a piece of scotch tape, and stretched it across both sides of the fan the fan is raised with a plastic housing , and smoothed down the middle on the fan's plastic. The fan stopped spinning, and the sound disappeared. The office was quiet again. I honestly don't suggest this fix. But, what I am saying is that you should check out your video card fans, and you can temporarily stop it to see if it resolves the audible issue. And really, you can try this with every fan, not just the video card fan.
Do be careful, however. Despite being plastic, some of these fan blades can hurt. Here is the answer after 3 years of noisy fan issues, My first solution was to replace the front fan in my Mac Pro Quad - this failed and was not the issue - second method was to pull the main board battery off the Motherboard, this worked but is very dangerous and if not done properly can damage the motherboard - the third solution is simple switch the machine off, pull out the power lead for 15 seconds, replug and wait 5 seconds, start machine, PROBLEM SOLVED.
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Ask Question. Is there anything obvious that my Mac needs or that might have caused the fan to get so loud?
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Andrew J. Brehm Andrew J. Brehm 1, 12 30 I'll try that. Brehm May 5 '11 at I looked this up, it's still advice Apple tells people. Will make it an answer. You can use iStat Pro islayer. Pay particular attention to the cooling fan itself and its vents, along with the entire back edge of your MacBook. The goal here is clean passageways for maximum airflow. There is a chance that the reason your MacBook is overheating is there's something wrong with the cooling fan itself. Baked into your Mac is a hardware diagnostic tool.
If it was made prior to June , you'll use the Apple Hardware Test. After that date, you'll use Apple Diagnostics.
How To Deal With Loud Fan Noises On Your Mac | Sound Support
These tools operate in a similar fashion. With your MacBook plugged in and all external peripherals removed, restart it and hold down the D key to start either diagnostic program. Follow the onscreen instructions to start the test. The standard test takes only a minute or two to complete and will report any hardware issues. For a more thorough investigation, you can check a box to run an extended test that will take an hour or more to complete.
Check out this Apple Support page of reference codes that may appear in the Test Results section after the test completes. There are three codes, all starting with "PPF," related to the cooling fan. If you get one of the results that indicates there may be an issue with your fan, it's time to contact Apple Support or visit your nearest Genius Bar for a repair. If your Mac is clean and grime-free and you are keeping your apps and tabs in check and the fan is still spinning frequently and loudly, then try resetting the System Management Controller SMC.
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The SMC is responsible for controlling low-level functions on your Mac including "thermal management," aka the cooling fan. Follow Apple's instructions for resetting the SMC. Read more: Everything you need to know about MacOS Mojave. How to set up Google's two-step verification: With a few minutes of setup time, your account will be much more secure. How to book an Uber or Lyft with Google Home: Use a Google Home and your phone to get the best ride. Be respectful, keep it civil and stay on topic. We delete comments that violate our policy , which we encourage you to read.
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