在大多数情况下，macOS 是一个运行良好的操作系统，很少遇到令人恼火的日常故障，但有时，您可能会发现音量控制甚至整个声音输出无法正常工作。
发生这种情况的原因有多种。我们将引导您解决罕见和常见的Mac声音问题，以帮助您解决问题。
1. 检查静音按钮！
如果您使用的是Apple键盘，则F10键兼作音频静音切换键。很容易不小心点击这个按钮，或者让你的猫在你不注意的时候“不小心”踩到它。因此，请按一下F10键，看看是否会取消静音。
2. 重新启动 Mac
您应该尝试的第一件事就是重新启动Mac。根据我们的经验，简单的重启即可解决 macOS 中的大多数声音故障。只需(Just)确保在重新启动计算机之前连接所有音频设备即可。有时，在计算机启动后连接音频设备是导致问题的原因。因此，在您看到Apple(Apple)徽标之前，请先将其全部连接起来。
3.检查您的硬件
有时问题在于您只是错误地连接了某些东西。例如，请确保您没有将扬声器插入输入而不是输出。如果您使用的是蓝牙(Bluetooth)音频设备，请尝试将其重置为出厂默认设置，然后再次将其与Mac配对。
以下是一些需要检查的一般事项：
- 确保(Make)您的Mac扬声器或耳机已正确插入。
- 检查扬声器或耳机的音频输出音量滑块以确保它们已调高。
- 检查Mac(Mac)上的音量滑块，确保音量已调高且静音按钮未启用。
- 如果您使用的是外置扬声器或耳机，请尝试使用内置扬声器（适用于MacBook(MacBooks)或 i Mac(Macs)或其他带有内置扬声器的
Mac ），看看问题是否出在外部设备上。(Macs)
- 检查(Check)Mac上的耳机插孔或音频端口以及扬声器或耳机本身是否有任何明显损坏。
如果您怀疑任何特定的设备是罪魁祸首，请尝试使用其他设备（如果可能）以消除其嫌疑。
4.检查您的声音设置
检查完物理硬件并使其正常工作后，下一步的故障排除步骤是确保声音设置正确。
要检查Mac(Mac)上的声音设置，请按照以下步骤操作：
- 打开系统(System) 偏好设置(Preferences)窗口。您可以通过单击屏幕左上角的Apple菜单并选择(Apple)“系统(System) 偏好设置”(Preferences)来执行此操作。在较新版本的 macOS 中，这现在称为“系统设置”(System Settings)。
- 在System Preferences/Settings窗口中，选择“声音”(Sound)。
- 在“输出”(Output)选项卡下，确保选择正确的设备作为输出设备。例如，您可能有一个未选择扬声器的HDMI设备。(HDMI)
- 在“输入”选项(Input)卡下，确保选择正确的设备作为输入设备。
- 在“声音(Sound) 效果”(Effects)选项卡下，确保“播放(Play)声音效果通过”选项设置为正确的设备。
另外，请务必检查音量滑块是否处于静音状态。
如果这里的一切看起来都正确，那么是时候进行更复杂的修复了。
5. 重置NVRAM ( Intel Mac(Intel Macs) ) 或PRAM ( Apple Silicon Mac(Apple Silicon Macs) )
NVRAM（非易失性随机存取存储器(Random-Access Memory)）或PRAM（参数 RAM(Parameter RAM)）是存储Mac用来访问某些功能的某些设置和信息的内存类型。如果您在Mac(Mac)上遇到音量或声音问题，您可能需要尝试重置它们，因为这有时可以帮助解决问题。
查看如何在 Mac 上重置 PRAM 和 SMC，(How To Reset PRAM & SMC On Your Mac)了解有关如何执行重置的更多信息。
6. 检查软件更新
如果您的Mac(Mac)上的音量或声音不起作用，最好检查是否有可用的软件更新。过时的软件有时会导致问题，安装最新版本的 macOS 可以帮助解决这些问题。
要检查更新，请转至Apple Menu > System Preferences/System Settings > General > Software Updates。
如果没有可用更新或更新后问题仍然存在，请尝试列表中的下一个修复。您还可以使用终端手动执行更新(use the terminal to perform updates manually)。
7.尝试不同的用户帐户
如果您的Mac(Mac)上的音量或声音不起作用，您可能需要尝试登录到其他用户帐户以查看问题是否仍然存在。这可以帮助确定问题是特定于您的用户帐户还是系统范围的问题。
Select Apple Menu > Log Out [您的名字]，然后选择备用用户帐户。这假设您设置了多个帐户。
如果登录到其他用户帐户后问题不再存在，则该问题可能是您的用户帐户特有的，可以通过删除您的帐户设置或对其进行故障排除来解决。如果登录到不同的用户帐户后问题仍然存在，则可能是系统范围的问题，需要进一步进行故障排除。
8.修复磁盘权限
如果您在Mac(Mac)上遇到音量或声音问题，您可能需要尝试修复Mac上的磁盘权限。磁盘(Disk)权限是一组规则，用于确定允许哪些用户和进程访问Mac上的某些文件和文件夹。如果权限不正确，可能会导致您的Mac出现问题。
要了解如何修复磁盘权限，请查看如何在 macOS 中修复或修复磁盘权限(How to Fix or Repair Disk Permissions in macOS)。
9.尝试安全模式
您可能想尝试以安全模式启动(Safe Mode)Mac。安全模式(Safe Mode)是一种特殊的启动模式，允许您通过启动最少的驱动程序和程序来
排除和修复 Mac 的问题。(Mac)
有关如何在 macOS 中启动进入安全模式的(Mode)说明，请查看如何在安全模式下启动和使用 Mac(How to Boot Up and Use a Mac in Safe Mode)
如果问题在安全模式(Safe Mode)下消失，则很有可能问题出在第三方应用程序上，而不是 macOS 上。
10.检查第三方软件冲突(Third-Party Software Conflicts)
如果安全模式(Safe Mode)下不存在问题，最好检查与您安装的第三方软件是否存在冲突。第三方软件有时会干扰Mac的正常运行并导致此类问题。
如果问题从您启动Mac(Mac)的那一刻起就出现，则可能是您的启动程序之一。查看如何在 macOS 上启用或禁用启动程序，(How to Enable or Disable Startup Programs on macOS)了解如何有选择地禁用程序，直到找到导致问题的程序。
11.重置系统管理控制器(System Management Controller)（SMC）
系统管理控制器(System Management Controller)( SMC )是(SMC)Mac中的一个芯片，用于控制某些硬件组件的电源。如果您在Mac(Mac)上遇到音量或声音问题，您可能需要尝试重置SMC，因为这有时可以帮助解决问题。
查看如何在 Mac 上重置 PRAM 和 SMC，(How To Reset PRAM & SMC On Your Mac)了解有关如何执行重置的更多信息。如果重置SMC(SMC)后问题仍然存在，您可能需要考虑向技术支持专家寻求进一步的帮助。
进一步的故障排除步骤
上述修复代表了针对此特定问题的最直接的故障排除路径，但如果您仍然没有工作声音，您可以尝试一些其他方法，
苹果硬件诊断
(Check)通过运行Apple Hardware Test(Apple Hardware Test)或Apple Diagnostics检查是否有任何硬件问题。为此，请关闭Mac并按电源按钮将其重新打开。立即(Immediately)按住键盘上的 D 键。当您看到登录窗口时松开按键。Apple Hardware Test或Apple Diagnostics将自动启动。按照提示完成测试。
在Apple Silicon Mac(Apple Silicon Macs)上，新方法是在关闭状态下按住电源按钮，直到看到启动选项列表。然后按Command + D启动诊断工具。
使用磁盘工具(Disk Utility)检查错误和损坏
(Check)通过运行“磁盘工具”(Disk Utility)检查是否有任何软件问题。为此，请转到“应用程序”文件夹中的实用程序文件夹并启动“磁盘实用程序”(Disk Utility)。在“磁盘工具”(Disk Utility)窗口中选择您的硬盘驱动器，然后单击“验证磁盘”(Verify Disk)按钮。如果发现任何问题，请单击修复磁盘(Repair Disk)按钮尝试修复它们。
(Check)通过运行安全启动(Boot)并使用磁盘工具(Disk Utility)修复硬盘来检查是否有任何损坏的系统文件。为此，请以安全模式启动(Safe Mode)Mac，然后按上述方式
运行“磁盘工具” 。(Disk Utility)
Thunderbolt 和 USB 音频设备
如果您使用的是Thunderbolt或USB音频设备，请尝试将其拔出然后重新插入，看看是否可以解决问题。
恶意软件和病毒
如果您怀疑恶意软件可能导致该问题，您可能需要尝试使用防病毒程序在(antivirus program)Mac上运行恶意软件扫描。
重新启动核心音频
如果您遇到 coreaudiod（处理声音控制器的核心音频进程）的问题，您可能需要尝试重新启动该进程。
您可以通过将以下命令粘贴到终端(Terminal)中并按Enter来(Enter)重新启动 Core Audio 组件(restart the Core Audio component)。
须藤killall coreaudiod
如果您已尝试所有这些步骤，但音频问题仍未解决，您可能需要联系Apple支持或前往Apple Store 零售店，以获得有关声音问题的进一步帮助。
Volume or Sound Not Working on Mac? 11 Fixes to Try
For the most part, macOS is a well-behaved operating system that rarely experiences irritating dаy-tо-day glitchеs, but now and then, you may fіnd that your volume controls or evеn your sound output as a whole aren’t working correctly.
There are several reasons why this may happen. We’ll walk you through both rare and common Mac sound issues to help you fix the problem.
1. Check The Mute Button!
If you’re using an Apple keyboard, then the F10 key doubles as the audio mute toggle. It’s far too easy to accidentally tap this button, or have your cat “accidentally” step on it when you aren’t looking. So give the F10 key a press to see if it unmutes your sound.
2. Restart Your Mac
One of the first things you should try is restarting your Mac. In our experience, a simple reboot resolves most sound glitches in macOS. Just ensure all of your audio equipment is connected before restarting the computer. Sometimes connecting audio devices after the computer has already started is the cause of the issue. So hook it all up before you see the Apple logo.
3. Check Your Hardware
Sometimes the problem is that you’ve simply hooked something up incorrectly. Make sure that you haven’t, for example, plugged your speakers into an input instead of an output. If you’re using a Bluetooth audio device, try resetting it to factory defaults and pairing it with your Mac again.
Here are some general things to check:
- Make sure that your Mac speakers or headphones are properly plugged in.
- Check your speakers’ or headphones’ audio output volume slider to ensure they are turned up.
- Check the volume slider on your Mac to ensure that the volume level is turned up and the mute button is not enabled.
- If you are using external speakers or headphones, try using the internal speakers (for MacBooks or iMacs or other Macs with built-in speakers) to see if the issue is with the external device.
- Check for any visible damage to the headphone jack or audio port on your Mac and the speakers or headphones themselves.
If you suspect any specific piece of gear is to blame, try it with another device if possible to eliminate it as a suspect.
4. Check Your Sound Settings
With your physical hardware inspected and in working order, the next troubleshooting step is ensuring your sound settings are correct.
To check your sound settings on a Mac, follow these steps:
- Open the System Preferences window. You can do this by clicking on the Apple menu in the top left corner of your screen and selecting System Preferences. In newer versions of macOS, this is now called System Settings.
- In the System Preferences/Settings window, select Sound.
- Under the Output tab, make sure that the correct device is selected as the output device. For example, you may have an HDMI device without speakers selected.
- Under the Input tab, make sure that the correct device is selected as the input device.
- Under the Sound Effects tab, make sure that the Play sound effects through option is set to the correct device.
Also, be sure to check that the volume slider isn’t muted.
If everything here looks correct, it’s time to move on to more sophisticated fixes.
5. Reset the NVRAM (Intel Macs) or PRAM (Apple Silicon Macs)
NVRAM (Non-Volatile Random-Access Memory) or PRAM (Parameter RAM) are types of memory that store certain settings and information that your Mac uses to access certain features. If you’re experiencing an issue with volume or sound on your Mac, you may want to try resetting them, as this can sometimes help to resolve the issue.
Check out How To Reset PRAM & SMC On Your Mac for more information on how to perform the reset.
6. Check for Software Updates
If volume or sound is not working on your Mac, checking for any available software updates is a good idea. Outdated software can sometimes cause issues, and installing the latest version of macOS can help to resolve these issues.
To check for updates, go to Apple Menu > System Preferences/System Settings > General > Software Updates.
If no updates are available or the issue persists after updating, try the next fix on the list. You can also use the terminal to perform updates manually.
7. Try a Different User Account
If volume or sound is not working on your Mac, you may want to try logging in to a different user account to see if the issue persists. This can help to determine if the issue is specific to your user account or if it is a system-wide issue.
Select Apple Menu > Log Out [Your Name] and then choose an alternative user account. This assumes that you have multiple accounts set up.
If the issue does not persist when logged in to a different user account, it is likely that the issue is specific to your user account and can be resolved by deleting or troubleshooting your account settings. If the issue persists when logged in to a different user account, it’s probably a system-wide issue requiring further troubleshooting.
8. Repair Disk Permissions
If you’re experiencing an issue with volume or sound on your Mac, you may want to try repairing the disk permissions on your Mac. Disk permissions are a set of rules that determine which users and processes are allowed to access certain files and folders on your Mac. If the permissions are incorrect, it can cause issues with your Mac.
To learn how to repair disk permissions, check out How to Fix or Repair Disk Permissions in macOS.
9. Try Safe Mode
You may want to try starting your Mac in Safe Mode. Safe Mode is a special boot mode that allows you to troubleshoot and fix issues with your Mac by starting up with a minimal set of drivers and programs.
For instructions on how to boot into Safe Mode in macOS, check out How to Boot Up and Use a Mac in Safe Mode
If the issue goes away in Safe Mode, it’s a good bet that the problem is with a third-party application, not macOS.
10. Check for Third-Party Software Conflicts
If the problem isn’t present in Safe Mode, it’s a good idea to check for any conflicts with third-party software that you have installed. Third-party software can sometimes interfere with the normal functioning of your Mac and cause issues like this.
If the problem is present right from the moment you boot up your Mac, it’s likely one of your startup programs. Check out How to Enable or Disable Startup Programs on macOS to see how you can selectively disable programs until you find the one causing the issue.
11. Reset the System Management Controller (SMC)
The System Management Controller (SMC) is a chip in your Mac that controls power to certain hardware components. If you’re experiencing an issue with volume or sound on your Mac, you may want to try resetting the SMC, as this can sometimes help to resolve the issue.
Check out How To Reset PRAM & SMC On Your Mac for more information on how to perform the reset. If the issue persists after resetting the SMC, you may want to consider looking for further assistance from a technical support specialist.
Further Troubleshooting Steps
The above fixes represent the most straightforward troubleshooting path for this particular problem, but if you still don’t have working sound, there are a few miscellaneous things you can try,
The Apple Hardware Diagnostic
Check for any hardware issues by running Apple Hardware Test or Apple Diagnostics. To do this, shut down your Mac and press the power button to turn it back on. Immediately press and hold the D key on your keyboard. Release the key when you see the login window. Apple Hardware Test or Apple Diagnostics will start automatically. Follow the prompts to complete the test.
On Apple Silicon Macs, the new method is to press and hold the power button from a power off state until you see a list of start options. Then press Command + D to start the diagnostic tool.
Using Disk Utility To Check for Errors and Corruption
Check for any software issues by running Disk Utility. To do this, go to the utility folder in your Applications folder and launch Disk Utility. Select your hard drive in the Disk Utility window and click on the Verify Disk button. If any issues are found, click on the Repair Disk button to try to repair them.
Check for any corrupt system files by running a Safe Boot and using Disk Utility to repair the hard drive. To do this, start your Mac in Safe Mode and then run Disk Utility as described above.
Thunderbolt and USB Audio Devices
If you’re using a Thunderbolt or USB audio device, try unplugging it and then plugging it back in to see if this resolves the issue.
Malware and Viruses
If you suspect that malware may be causing the issue, you may want to try running a malware scan on your Mac using an antivirus program.
Restarting Core Audio
If you’re experiencing an issue with coreaudiod, the core audio process that handles the sound controller, you may want to try restarting the process.
You can restart the Core Audio component by pasting the command below in Terminal and pressing Enter.
sudo killall coreaudiod
If you’ve tried all of these steps and your audio issue is still unresolved, you may want to contact Apple support or go to an Apple store for further assistance with your sound problems.
