在大多数情况下， MacBook Air(MacBook Air)或MacBook Pro的日常使用应该是相对安静的。然而，有时，这些笔记本电脑中的高音风扇会启动并产生刺耳的噪音。为什么你的 MacBook Pro如此响亮和嘈杂？以下是一些可能的原因，以及潜在的修复方法。
为什么粉丝通常会旋转
首先，让我们确定为什么您的粉丝通常会转起来。当您的 MacBook 的组件，尤其是CPU工作时，它们会产生热量作为副产品。风扇吸出热空气，将冷空气吸入系统，防止计算机过热。
虽然这在您玩视频游戏或以其他方式推动系统时是正常的，但当您的计算机空闲或用于网页浏览或在文字处理器中编写文档时不应该发生这种情况。风扇可能会在轻负载下短暂启动，但不应保持打开状态。如果他们这样做，您需要进一步调查。
后台应用程序
尽管您可能不会在前台使用MacBook来处理繁重的任务，但后台可能会发生很多事情。在空闲时间，您的 macOS 可能会执行一些内务处理任务。例如，macOS Spotlight Search是一个常见的罪魁祸首，因为它会在您不使用 Mac 的内容时对其进行索引。
您可以通过打开活动监视器(Activity Monitor)轻松检查哪些程序和进程正在使用您的CPU资源。您可以使用以下两种方法之一找到它：
- Applications > Utilities > Activity Monitor。
- 按Command + Space Bar打开Spotlight并键入Activity Monitor。
如果您想了解有关使用活动监视器(Activity Monitor)的更多信息，请查看活动监视器及其使用方法(The Activity Monitor & How To Use It)指南。如果您想知道如何杀死那些占用 CPU 的进程，那么在 Mac 上强制退出应用程序的 5 种方法可以(5 Ways To Force Quit Apps On Your Mac)找到答案。
不要堵塞通风口
除了新款M1 MacBook Air外，所有 MacBook 都有通风孔。
MacBook Pro设备可以在计算机的侧面和背面安装这些。由于通风口不在底部，因此当设备放在膝盖上时，您不会挡住它们。
但是，如果将笔记本电脑放在柔软的表面（枕头或床）上，则可能会阻塞后部通风口并导致风扇旋转得更多，因为没有足够的气流将热空气排出系统。
您可以使用“膝上桌(lap desk)”来避免堵塞通风口。有许多选择可以提供永远不会阻塞通风口的最佳表面。
检查通风口是否有污垢
除了堵塞的通风口外，可能还有内部障碍物阻止空气自由流动。清洁 MacBook 上的通风口可能是一个解决方案。
清洁通风口时请记住以下提示：
- 您可以（小心地）使用压缩空气除尘器(compressed air duster)。请遵循随附的说明，并避免在使用时将它们偏离轴。它们可以射出冷气流并在计算机或其通风口内形成冷凝。
考虑清洁(Cleaning Inside)MacBook内部
随着时间的推移，灰尘可能会积聚在MacBook内部并堵塞鼓风机式风扇，从而降低它们的效率。按照以下提示打开笔记本电脑以清洁内部灰尘。
- 您必须从底部面板上卸下六个五角螺钉。
- 使用(Use)撬棒松开面板的左右两侧。
- 以正确的方式滑动它以避免使盖子凹陷。
- 小心清除鼓风机中积聚的灰尘。
为您的确切型号查找YouTube 视频，(YouTube video for your exact model)了解如何打开您的笔记本电脑并清洁风扇。
重置系统管理控制器(System Management Controller)
有时MacBook(MacBook)的风扇控制系统可能会出现故障。这可以通过重置系统管理控制器(System Management Controller)( SMC ) 来解决。如何做到这一点的确切方法因型号而异。
在配备 T2 的 Mac 上重置 SMC(Reset the SMC on T2-equipped Macs)
如果您不确定您的Mac是否为 T2 型号，请使用Google搜索您的型号名称和“T2”一词。对于配备 T2 安全芯片的新款 MacBook ：(MacBook)
- 关闭计算机。
- 在内置键盘上，按住左 Control(left Control)、左 Option(left Option)和右 Shift(right Shift)键七秒钟(seven seconds)。
- 在不释放任何这些按钮的情况下，按住电源按钮(power button)。
- 再等七秒钟(seven more seconds)，然后松开所有四个按钮(release all four buttons)。
- 等待几秒钟，然后像往常一样按电源按钮(power button)打开计算机。
在非 T2 Mac 上重置 SMC(Reset the SMC on Non-T2 Macs)
大多数 2017 年或更早的 MacBook 没有 T2 芯片，因此它们有不同的重置方法：
- 关闭计算机。
- 使用内置键盘，按住左 Shift、左 Control(left Shift, left Control)和左 Option(left Option)键。
- 用左手按住所有三个键的同时，按住电源按钮(power button)。
- 等待10 秒(10 seconds)。
- 释放(Release)所有内容，等待几秒钟，然后像往常一样打开Mac电源。(Mac)
使用可拆卸电池在 Mac 上重置 SMC(Reset the SMC on Mac with Removable Battery)
请按照以下步骤在带有可拆卸电池 的Mac上重置SMC ：
- 关闭计算机。
- 取出电池。(battery.)
- 按住电源按钮(power button)5(5 seconds)秒钟。
- 把电池放回去。
- 打开你的 Mac。
macOS更新可能(Update Could)是解决方案
过去，某些型号的MacBook已成为风扇错误的牺牲品，风扇会对各种温度水平做出错误响应。如果您的粉丝在最近更新后出现问题，您可能需要考虑降级(downgrading )macOS。或者，如果有待处理的更新，请安装它以查看是否解决了问题。
答案(Answer)，我的朋友(My Friend)，在风中飘扬(Wind)
毕竟，希望你现在拥有一台 MacBook(MacBook)，它不太容易无缘无故地掀起飓风。
如果您需要升级笔记本电脑，请考虑使用最新的M1 MacBook Air或MacBook Pro机型。他们使用在低得多的温度下运行的 Apple Silicon 。
M1 MacBook Air(M1 MacBook Air)根本没有风扇！尽管我们努力为在线技术提示 YouTube(Online Tech Tips YouTube)频道制作视频，但我们自己的M1 MacBook Pro尚未吸引粉丝。(M1 MacBook Pro)如果您对 M1 系列感到好奇，请查看Apple M1 与 Intel i7：基准战(Apple M1 vs. Intel i7: The Benchmark Battles)。
MacBook Pro Fans Loud and Noisy? 5 Ways to Fix
In most сases, the everyday use оf a MacBook Air or MacBook Pro should be relatively silent. Yet sometimes, the high-pitched fans in these laptops crank up and result in an ear-piercing noise. Why is your MacBook Pro so loud and noisy? Here are a few likely reasons, along with potential fixes.
Why the Fans Usually Spin Up
First, let’s identify why your fans usually spin up. When your MacBook’s components, especially the CPU, are working hard they generate heat as a byproduct. The fans suck out the hot air and cool air is drawn into the system, preventing your computer from overheating.
While this is normal when you’re playing video games or otherwise pushing the system, it shouldn’t happen when your computer is idling or being used for web browsing or writing a document in a word processor. The fans might briefly come on under light loads but shouldn’t stay on. If they do, you need to investigate further.
Background Applications
Although you might not use the MacBook for heavy tasks in the foreground, there can be a lot going on in the background. It’s during idle times that your macOS may do some housekeeping tasks. For example, macOS Spotlight Search is a common culprit as it indexes your Mac’s content when you aren’t using it.
You can easily check which programs and processes are using your CPU resources by opening the Activity Monitor. You can find this using one of two methods:
- Applications > Utilities > Activity Monitor.
- Press Command + Space Bar to open Spotlight and type Activity Monitor.
If you want to know more about using Activity Monitor, check out The Activity Monitor & How To Use It guide. If you want to know how to kill those CPU-hogging processes, then 5 Ways To Force Quit Apps On Your Mac has the answers.
Don’t Block the Vents
Apart from the new M1 MacBook Air, all MacBooks have air vents.
MacBook Pro devices can have these along the sides and back of the computer. Since the vents are not on the bottom, you won’t block them when the device is on your lap.
However, if you put the laptop on a soft surface (a pillow or bed), you may block the rear vent and cause the fans to spin more since there isn’t enough airflow to shift hot air out of the system.
You can use a “lap desk” to avoid blocking the vents. There are many choices that provide an optimal surface that will never block vents.
Check Vents for Dirt
Aside from blocked vents, there could be internal obstructions that prevent air from flowing freely. Cleaning the vents on your MacBook may be a solution.
Keep the following tips in mind when cleaning your vents:
- A small soft brush is a good choice to clean the vent openings themselves.
- You can (carefully) use a compressed air duster. Follow the included instructions and avoid turning them off-axis while in use. They can shoot out a cold gas stream and cause condensation to form inside the computer or its vents.
- Try using a keyboard vacuum with a small brush attachment to get the dust out of the vent. Be careful when using a powered device around sensitive computer equipment.
Consider Cleaning Inside the MacBook
Over time, dust might accumulate inside your MacBook and clog the blower-style fans, making them less effective. Open up the laptop to clean the dust inside following the tips below.
- If your MacBook is still under warranty, consider getting a certified repair shop to do the maintenance instead.
- If you want to do this yourself, use the iFixit Essentials Electronics Toolkit, or at least a P5 Pentalobe screwdriver for the Retina MacBook Pro and MacBook Air models. Here are some basic steps, as an example, to get inside the 2019 MacBook Pro:
- You have to remove six pentalobe screws from the bottom panel.
- Use spudgers to unclip the left and right sides of the panel.
- Slide it in just the right way to avoid denting the cover.
- Carefully remove any dust built up in the blower fans.
Lookup a YouTube video for your exact model to see how to open up your laptop and clean the fans.
Reset the System Management Controller
Sometimes the fan control system of a MacBook can get out of sorts. This can be fixed by resetting the System Management Controller (SMC). The exact method on how to do this varies by model.
Reset the SMC on T2-equipped Macs
If you aren’t sure if your Mac is a T2 model, use Google to search for your model name and the term “T2”. For the newer models of MacBook with the T2 security chip:
- Shut down your computer.
- On the built-in keyboard, press and hold the left Control, left Option and right Shift keys for seven seconds.
- Without releasing any of these buttons, hold the power button down.
- Wait seven more seconds, then release all four buttons.
- Wait a few seconds, then press the power button as usual to turn on your computer.
Reset the SMC on Non-T2 Macs
Most MacBooks from 2017 or earlier don’t have a T2 chip, and so they have a different reset method:
- Shut down your computer.
- Using the built-in keyboard, press and hold the left Shift, left Control and left Option keys.
- While holding all three keys with your left hand, hold down the power button.
- Wait 10 seconds.
- Release everything, wait a few seconds, and power on your Mac as usual.
Reset the SMC on Mac with Removable Battery
Follow the steps below to reset the SMC on a Mac with a removable battery:
- Shut down the computer.
- Remove the battery.
- Hold the power button for 5 seconds.
- Put the battery back.
- Power on your Mac.
A macOS Update Could Be the Solution
In the past, some models of MacBook have fallen prey to fan bugs where the fan would respond incorrectly to various temperature levels. If your fan developed issues after a recent update, you might want to consider downgrading macOS. Alternatively, if there’s a pending update, install it to see if that resolved the issue.
The Answer, My Friend, Is Blowin’ in the Wind
After all that, hopefully, you now have a MacBook that’s slightly less prone to whipping up a hurricane for no good reason.
If you’re due for a laptop upgrade, consider one of the latest M1 MacBook Air or MacBook Pro models. They use Apple Silicon that runs at much lower temperatures.
The M1 MacBook Air has no fans at all! Our own M1 MacBook Pro has yet to spin up its fans, despite working hard to make videos for the Online Tech Tips YouTube channel. If you’re curious about the M1 range, check out Apple M1 vs. Intel i7: The Benchmark Battles.
