mac 重置smc_如何（以及何時）在Mac上重置SMC
mac 重置smc
Your Mac is acting funny, and you’ve tried everything: restarting your computer, resetting the NVRAM, and all the tricks that speed up a slow Mac. You even ran 50+ diagnostics at once to see what’s going on, and yet you find nothing. What’s the next step?
您的Mac表現得很有趣，您已經嘗試了一切：重新啟動計算機，重置NVRAM
You could try resetting the SMC, or System Management Controller, as a last resort. The SMC manages low level settings, like thermal and battery management. It’s rare, but problems with the SMC can effect performance, and also cause bugs like fans that run constantly even when CPU usage isn’t high. If you’re havingproblems, and have tried everything else, resetting the SMC is a logical next step.
作為最後的選擇，您可以嘗試重置SMC或系統管理控制器。 SMC管理低階設定，例如熱量和電池管理。 這種情況很少見，但SMC的問題會影響效能，並且還會導致風扇(即使在CPU使用率不高的情況下也會不斷執行)等錯誤。 如果您遇到問題，並且已經嘗試了其他所有方法，那麼重置SMC是順理成章的下一步。
The exact method for doing thisvaries depending on your Mac. Any Mac laptop made since 2009 doesn’t have a removable battery, meaning you’ll need a keyboard shortcut to get the job done. Mac desktops, meanwhile, basically just need to be unplugged. We’ll discuss all your options.
具體執行方法取決於您的Mac。 自2009年以來生產的所有Mac膝上型電腦都沒有可拆卸電池，這意味著您需要鍵盤快捷鍵才能完成工作。 同時，Mac桌上型電腦基本上只需要拔掉電源即可。 我們將討論您的所有選擇。
SMC實際做什麼？ (What Does the SMC Actually Do?)
Some functionality of your Mac works regardless of whether it’s turned on. For example: when you plug in the power supply for your Mac laptop, the lights on the charger work even if your Mac is completely shut down. It’s the SMC that makes this possible.
無論Mac是否開啟，Mac的某些功能都可以使用。 例如：當您插入Mac膝上型電腦的電源時，即使Mac完全關閉，充電器上的指示燈仍會工作。 正是SMC使這一切成為可能。
Here’s a complete list of what the SMC does, straight from the Apple website :
這是SMC功能的完整列表，直接來自Apple網站：
- Responding to presses of the power button 響應按下電源按鈕
- Responding to the display lid opening and closing on Mac notebooks響應Mac膝上型電腦上的顯示屏蓋開啟和關閉
- Battery management電池管理
- Thermal management熱管理
- SMS (Sudden Motion Sensor)SMS(突然運動感測器)
- Ambient light sensing 環境光感應
- Keyboard backlighting鍵盤背光
- Status indicator light (SIL) management狀態指示燈(SIL)管理
- Battery status indicator lights電池狀態指示燈
- Selecting an external (instead of internal) video source for some iMac displays為某些iMac顯示器選擇外部(而非內部)視訊源
If any of these functions are behaving oddly, resetting the SMC could solve it. But problems with the SMC can also occasionally affect system performance. If your Mac runs slowly even when Activity Monitor doesn’t show a lot of CPU usage, and you’ve tried a number of other steps, resetting the SMC might help.
如果這些功能中的任何一個表現異常，則重置SMC即可解決該問題。 但是SMC的問題有時也會影響系統性能。 如果即使在活動監視器顯示CPU使用率不高的情況下Mac仍執行緩慢，並且您嘗試了許多其他步驟，則重置SMC可能會有所幫助。
您的電池可拆卸嗎？ (Is Your Battery Removable?)
Resetting the SMC works slightly differently on older MacBooks, which offered removable batteries. It’s easy to determine whether your MacBook has a removable battery: just look at the bottom. If you see a single piece of metal, with no slider for removing the battery, your battery is not considered removable for the sake of this tutorial.
重置SMC在舊版MacBook(提供可拆卸電池)上的工作方式略有不同。 確定MacBook是否具有可拆卸電池很容易：只需看一下底部。 如果您看到一塊金屬，沒有用來卸下電池的滑塊，那麼出於本教程的考慮，您的電池不被視為可拆卸的。
If, however, you can see a crack outlining a rectangular section, and there’s some mechanism for opening something nearby, you’ve got a removable battery.
但是，如果您看到一條裂縫勾勒出一個矩形截面，並且附近有某種機制可以開啟某些物體，則您有一塊可拆卸的電池。
According to Apple, the following models do not offer a removable battery.
根據Apple的說法，以下型號不提供可拆卸電池。
- Every MacBook Pro made after late 2009. 2009年底以後生產的每臺MacBook Pro。
- Every MacBook Pro with Retina 每個配備Retina的MacBook Pro
- Every MacBook Air 每臺MacBook Air
- Every MacBook made since 2009 自2009年以來生產的每臺MacBook
Like we said: it’s been a long time since Apple laptops had removable batteries. Odds are yours doesn’t. But resetting the SMC works differently depending on whether you have one, so determine that before proceeding.
就像我們說的：自從蘋果膝上型電腦配備可拆卸電池以來，已經有很長時間了。 賠率不是您的。 但是根據您是否擁有SMC，重置SMC的工作方式有所不同，因此請在繼續操作之前確定這一點。
在沒有可移動電池的Mac膝上型電腦上重置SMC (Resetting the SMC on a Mac Laptop Without Removable Batteries)
Update: If you have a newer Mac with an Apple T2 Security Chip (found in many Macs released in 2018 or later), you’ll need to use aslightly different process to reset your Mac’s SMC.
更新：如果您擁有配備Apple T2安全晶片的較新Mac(在2018年或更晚釋出的許多Mac中都可以找到)，則需要使用略有不同的過程來重置Mac的SMC 。
If you havea MacBook without a removable battery, you can reset the SMC by turning on your computer while holding a specific keyboard shortcut. Here’s what to do.
如果您的MacBook沒有可拆卸的電池，則可以在按住特定鍵盤快捷鍵的同時開啟計算機，以重置SMC。 這是要做的事。
- Unplug the power, then shut down your Mac. 拔下電源，然後關閉Mac。
Hold the left Shift+Control+Option keys down, then press and hold the power button down. Keep all four buttons pressed down for ten seconds, then let go.
按住左Shift + Control + Option鍵，然後按住電源按鈕。 按住所有四個按鈕十秒鐘，然後放開。
- Plug the power cable back in, then turn on your Mac. 重新插入電源線，然後開啟Mac。
The SMC is now reset.
現在，SMC已重置。
在帶有可移動電池的舊Mac膝上型電腦上重置SMC (Resetting SMC on an Older Mac Laptop With Removable Batteries)
If you havean older MacBook with a removable battery, the keyboard shortcut outlined above will not work. Here’s what you have to do instead.
如果您有帶可拆卸電池的較舊MacBook，則上述鍵盤快捷鍵將不起作用。 這是您要做的。
- Shut down your Mac. 關閉您的Mac。
- Remove the battery. 取出電池。
- Press and hold the power button for five seconds, then re-connect both the battery and the power. Turn on your Mac. 按住電源按鈕五秒鐘，然後重新連線電池和電源。 開啟Mac。
Your SMC is now reset.
現在，您的SMC已重置。
在Mac桌面上重置SMC (Resetting SMC on a Mac Desktop)
If you havean iMac, a Mac Mini, or a Mac Pro, resetting the SMC is dead simple:
如果您擁有iMac，Mac Mini或Mac Pro，則重置SMC非常簡單：
- Shut down your Mac, then unplug the power cable. 關閉您的Mac，然後拔下電源線。
- Wait 15 seconds. 等待15秒鐘。
- Plug the power cord back in, then turn on your Mac. 重新插入電源線，然後開啟Mac。
The SMC is now reset.
現在，SMC已重置。
Photo Credits: cdelmoral, Rob DiCaterino
攝影： cdelmoral ， Rob DiCaterino
翻譯自: https://www.howtogeek.com/312086/how-and-when-to-reset-the-smc-on-your-mac/
mac 重置smc