Your Mac fan may kickstart when you're running intensive tasks or resource-heavy apps that make your Mac overheat. With MacBooks in particular, fan noise can sound as though your Mac wants to take off. By the way, in case of overheating, your Mac usually slows down.
Clean dust out of your Mac One of the big problems with fan-based cooling is it draws in dust as well as air. Over time, that builds up and sits on the motherboard and components like a blanket. Removing this dust can stop your Mac overheating and producing loud fan noise.
Bring down the ambient temperature It might seem obvious, but if you're in a hot room, your Mac will be hot too. That could be enough to make it spin up its fans and start making a noise. The fix is quite simple: bring down the temperature in the room by opening a window or lowering your heating.
It seems that the 2020 Air runs hotter and louder than the previous generation did because the cooling system isn't sufficient to deal with the faster processors in the new model.
If your device's processor is working on intensive tasks—such as compressing HD video, playing a graphics-heavy game, or indexing the hard drive with Spotlight after you migrate data—the fans run faster to provide additional airflow.
Typically the fan runs faster depending on how warm the notebook is. Some fans in notebooks are louder than others and will get louder with time. Given the fact your notebook is brand new it's unlikely the fan is dirty and more likely spinning from heat or another cause.
A loud computer fan happens when your computer is generating a lot of heat, which causes your computer's fans to leap into action, forcing the hot air out of your PC so that cooler air can cycle in. Loud computer fans can also be caused by dust building up in your PC, which negatively impacts its performance.
A loud computer fan is usually caused by dust and dirt, so get out the compressed air cans and give your PC or laptop a quick blast of clean air to clean them as part of your regular PC maintenance routine. Loud computer fans are overworked fans, which could impact the overall performance of your PC.
If your Mac is overheating or if the fans are loud even when it's cold, it could have a more serious problem. That could be software or hardware related. In the case of faulty hardware, there's little you can do except try to get it repaired.
Make Sure Airflow is not Blocked Around the Chasis Whenever you find your Mac's fans making a lot of noise, the very first thing that you should do to fix the issue is to ensure that nothing is blocking the airflow around the chassis. Thanks to vents, Macs are able to bring in cool air and expel hot air.
If you can hear the fan running but little or no air is coming out of the vent, the internal airflow is probably being blocked by dust. Solution: Blowing compressed air through the vents is often enough to dislodge any dust that may have accumulated on the inside of your laptop.
A gaming laptop fan can get so loud when it spins so fast to reduce the heat temperature that the CPU and GPU produce as they are placed in a closed box/space. The sound can get so loud because it is hot air rushing through the laptop's air vents.