mac uvc相机

Apple MacBooks and desktop Macs often include a built-in webcam. You can also connect an external webcam to your Mac via USB. If your webcam isn’t working, or appears to be disconnected or unavailable in macOS, there are several steps you can take to (hopefully) get it going again.

苹果MacBook和台式Mac通常包含内置的网络摄像头。 您也可以通过USB将外部网络摄像头连接到Mac。 如果您的网络摄像头无法正常工作，或者在macOS中似乎已断开连接或不可用，则可以采取几个步骤来(希望)重新开始。

看看是否有任何东西遮盖镜头 (See If Anything Is Covering the Lens)

It’s always best to check the basics first. It might sound obvious, but if your webcam isn’t working properly, the lens might just be blocked or covered with something. Many people cover their webcam when it’s not in use to protect their privacy.

最好总是先检查基础知识。 听起来似乎很明显，但是如果您的网络摄像头无法正常工作，则镜头可能只是被遮挡或覆盖了某些东西。 许多人在不使用网络摄像头时都会遮盖住它们，以保护自己的隐私。

If you’re not getting any errors, and all you see is a black screen, make sure there isn’t anything covering your webcam. It’s easy to apply a cover and forget about it, especially if you don’t use your webcam frequently.

如果没有任何错误，并且看到的只是黑屏，请确保没有任何东西遮盖网络摄像头。 轻松套上保护套，而不必理会它，特别是如果您不经常使用网络摄像头时。

检查网络摄像头的权限 (Check the Webcam’s Permissions)

When you open an app that wants to access the webcam for the first time, macOS will prompt you to allow it to do so. It’s easy (and often sensible) to deny access at first, but this can pose a problem when it comes to making video calls or recordings.

当您第一次打开要访问网络摄像头的应用程序时，macOS会提示您允许它进行访问。 首先，拒绝访问很容易(而且通常很明智)，但这在进行视频通话或录制时会造成问题。

You can give any app permission to access your webcam by heading to System Preferences > Security and Privacy > Camera. Any apps that have requested access will be listed here. If there’s a checkmark in the box next to them, they’re approved. If the box is empty, permission was denied.

您可以转到系统偏好设置>安全和隐私>摄像头，授予任何应用访问网络摄像头的权限。 任何请求访问权限的应用都将在此处列出。 如果它们旁边的方框中有一个选中标记，则表明它们已获批准。 如果该框为空，则权限被拒绝。

You can change any of these settings by clicking the lock at the bottom of the screen, and then authenticating with your administrator password (or Touch ID, or Apple Watch). You can then approve (checkmark) or revoke (uncheck) apps and try again.

您可以通过单击屏幕底部的锁，然后使用管理员密码(或Touch ID或Apple Watch)进行身份验证来更改任何这些设置。 然后，您可以批准(选中标记)或撤消(取消选中)应用程序，然后重试。

终止VDCAssistant和AppleCameraAssistant进程 (Kill the VDCAssistant and AppleCameraAssistant Processes)

Two processes perform webcam duties that run in the background on your Mac: VCDAssistant and AppleCameraAssistant. Like any process on your Mac, these can stop working correctly at any time. Usually, when a process crashes, it’s restarted by the system automatically.

有两个过程执行在Mac后台运行的网络摄像头职责：VCDAssistant和AppleCameraAssistant。 就像Mac上的任何进程一样，这些进程可以随时停止正常运行。 通常，当进程崩溃时，系统会自动将其重新启动。

Sometimes, though, this doesn’t work. Fortunately, you can manually kill the processes with a Terminal command. To do this, launch Terminal by either searching for it in Spotlight or going to Applications > Utilities.

但是有时候，这是行不通的。 幸运的是，您可以使用Terminal命令手动终止进程。 为此，通过在Spotlight中搜索终端或转到“应用程序”>“实用程序”来启动终端。

Type the following command, and then press Enter:

键入以下命令，然后按Enter：

sudo killall VDCAssistant;sudo killall AppleCameraAssistant

Type your admin password to authenticate, and then try to use your webcam again. macOS should relaunch any processes your webcam relies on to function.

键入您的管理员密码进行身份验证，然后尝试再次使用您的网络摄像头。 macOS应该重新启动网络摄像头所依赖的任何功能。

If you don’t feel comfortable using Terminal, just restart your Mac instead of running the above command.

如果您不习惯使用Terminal，请重新启动Mac，而不是运行上述命令。

重新启动Mac (Restart Your Mac)

If killing the above processes didn’t work, try killing the whole operating system, instead. Some webcam problems are caused when multiple apps try to use it at once. You can solve this by restarting your computer, and not opening all the same apps when it boots.

如果杀死上述进程不起作用，请尝试杀死整个操作系统。 当多个应用尝试一次使用某些网络摄像头时，会引起一些问题。 您可以通过重新启动计算机来解决此问题，并且在启动时不打开所有相同的应用程序。

To do this, click the Apple menu, and then click “Restart.” In the window that appears, uncheck the box next to the “Reopen Windows When Logging Back in” option.

为此，请单击Apple菜单，然后单击“重新启动”。 在出现的窗口中，取消选中“重新登录时重新打开Windows”选项旁边的框。

Click “Restart,” wait for your Mac to power cycle, and then log in again when prompted. Relaunch the app that was trying to use your webcam and see if the problem is resolved.

单击“重新启动”，等待Mac重新启动，然后在出现提示时再次登录。 重新启动尝试使用您的网络摄像头的应用，然后查看问题是否已解决。

重新安装您要使用的应用程序 (Reinstall the App You’re Trying to Use)

If you have a webcam issue with a specific app that wasn’t fixed by updating your permissions under the “Check Your Webcam Permissions” section above, the problem might be the app itself.

如果您在使用特定应用程序时遇到了网络摄像头问题，而该问题无法通过上面“检查您的网络摄像头权限”部分下的权限更新得到解决，则问题可能出在应用程序本身。

Sometimes, apps just stop working. Older ones don’t always play nicely with the permissions system Apple includes in newer versions of macOS. Try deleting the app from your “Applications” folder by dragging it to the Trash icon in the dock or highlighting it, and then pressing Command+Delete.

有时，应用只是停止工作。 较旧的版本并不总是能与Apple在新版macOS中包含的权限系统很好地配合使用。 尝试从应用程序文件夹中删除该应用程序，方法是将其拖动到扩展坞中的垃圾箱图标或突出显示它，然后按Command + Delete。

Next, download and reinstall the app. Note how old the app in question is, as this could explain why you’re having a problem. If you reinstall the app and it doesn’t prompt you to access the camera, it could be incompatible with the latest version of macOS.

接下来，下载并重新安装该应用程序。 请注意有问题的应用程序有多旧，因为这可以解释您遇到问题的原因。 如果您重新安装该应用程序，但它不提示您访问摄像头，则可能与最新版本的macOS不兼容。

See if there’s an updated version of the app. Maybe someone has forked the app and continued the work of the developer? Alternatively, you can see if there’s a similar app you can use instead.

查看是否有该应用程序的更新版本。 也许有人分叉了该应用程序并继续开发人员的工作？ 另外，您可以查看是否有类似的应用可以代替。

检查您的屏幕时间权限 (Check Your Screen Time Permissions)

Screen Time is a core macOS feature that helps you monitor how you use your Mac. It’s also how macOS handles parental controls, which can include limiting access to the webcam and any apps that use it.

屏幕时间是macOS的一项核心功能，可帮助您监视Mac的使用方式。 这也是macOS处理家长控制的方式，其中可能包括限制对网络摄像头和使用它的任何应用程序的访问。

To check if Screen Time restrictions are the problem, head to System Preferences > Screen Time > Content and Privacy, and then click “Camera.” Make sure “Camera” is enabled under the Apps tab, as well. If it isn’t, you can either authenticate and change the setting, or ask the person who set the limitation to remove it.

要检查是否存在屏幕时间限制，请转到系统偏好设置>屏幕时间>内容和隐私，然后单击“相机”。 还要确保在“应用程序”标签下也启用了“相机”。 如果不是，您可以验证并更改设置，也可以要求设置限制的人删除它。

查看是否检测到内部网络摄像头 (See If Your Internal Webcam Is Detected)

If you’re using a MacBook or iMac, it has a built-in webcam. You can check if your computer is detecting the webcam properly. To do so, click the Apple menu at the top left, and then click “About.”

如果您使用的是MacBook或iMac，则它具有内置的网络摄像头。 您可以检查计算机是否正确检测到网络摄像头。 为此，请单击左上方的Apple菜单，然后单击“关于”。

Click “System Report,” and then select “Camera” in the sidebar. You should see something like “FaceTime HD Camera (Built-in)” listed, along with a bunch of numbers and model IDs. You can also check under the “USB” section and see if your webcam appears there.

单击“系统报告”，然后在侧栏中选择“摄像机”。 您应该会看到类似“ FaceTime HD摄像机(内置)”的清单，以及一堆数字和型号ID。 您还可以在“ USB”部分下检查并查看您的网络摄像头是否出现在其中。

If your internal webcam isn’t listed, a hardware fault or physical damage might have caused it to stop working. In that case, there’s not a lot you can do except have a technician take a look at it. However, parts and labor will likely cost you more than just buying an external webcam.

如果未列出您的内部网络摄像头，则可能是硬件故障或物理损坏导致其停止工作。 在这种情况下，除了让技术人员看一下之外，您无能为力。 但是，零件和人工将使您花费的不仅仅是购买外部摄像头。

Before abandoning all hope, though, you can try resetting the System Management Controller

但是，在放弃所有希望之前，您可以尝试重置系统管理控制器

重置系统管理控制器 (Reset the System Management Controller)

If you’ve tried everything else (or your webcam wasn’t listed in the System Report), you might want to try resetting your Mac’s System Management Controller (SMC). The SMC is responsible for low-level settings, like fans and LEDs, but it might also impact your internal webcam.

如果您尝试了其他所有方式(或系统报告中未列出您的网络摄像头)，则可能要尝试重置Mac的系统管理控制器(SMC)。 SMC负责风扇和LED等低级设置，但它也可能会影响您的内部网络摄像头。

How you reset the SMC depends entirely on which Mac you have. You can find your particular model and instructions for resetting the SMC here.

如何重置SMC完全取决于您拥有的Mac。 您可以在此处找到特定的型号和有关重置SMC的说明 。

外部网络摄像头问题 (Problems with an External Webcam)

MacBooks, iMacs, and the iMac Pro all have internal cameras. However, you might need to buy an external webcam for some Mac models, like the Mac mini or Mac Pro. It’s also possible to use superior external cameras as webcams if you want to boost the video quality.

MacBook，iMac和iMac Pro都具有内置摄像头。 但是，您可能需要为某些Mac型号(例如Mac mini或Mac Pro)购买外部摄像头。 如果您想提高视频质量，也可以使用优质的外部摄像机作为网络摄像头 。

If you’re using a USB webcam, make sure it’s plugged in. If it is, unplug it, and then plug it back in. Try using a different USB port and cord, just to make sure neither of these are causing the problem.

如果您使用的是USB网络摄像头，请确保已将其插入。如果已插入，请先将其拔出，然后再重新插入。请尝试使用其他USB端口和电源线，只是要确保这两个都不引起问题。

If your webcam is connected via a hub, make sure it’s getting enough power. Try removing the hub from the equation altogether and plug the webcam directly into your Mac. Does the webcam have any LEDs that indicate it’s in use?

如果您的网络摄像头是通过集线器连接的，请确保其电源足够。 尝试从方程式中完全删除集线器，然后将网络摄像头直接插入Mac。 网络摄像头是否有任何指示其正在使用的LED？

You can also check to see if your Mac is detecting the webcam. Click the Apple logo at the top left, and then click “About.” Click “System Report” in the window that opens and navigate to the “USB” section in the sidebar. Expand any of the options there and look for your webcam.

您还可以检查Mac是否正在检测网络摄像头。 单击左上方的Apple徽标，然后单击“关于”。 在打开的窗口中单击“系统报告”，然后导航到侧栏中的“ USB”部分。 在此处展开​​任何选项，然后寻找您的网络摄像头。

If there’s no visible LED on your webcam or it’s not listed under “System Report,” it might be dead. Try connecting it to another computer and see if you can isolate the problem.

如果网络摄像头上没有可见的LED或未在“系统报告”中列出，则可能是死灯。 尝试将其连接到另一台计算机，看看是否可以解决问题。

Most webcams don’t require additional drivers to work on macOS, but some might. Head to the manufacturer’s website and download any software that might be required to get your webcam working on macOS.

大多数网络摄像头不需要其他驱动程序即可在macOS上运行，但有些可能。 前往制造商的网站并下载使网络摄像头在macOS上运行所需的任何软件。

最终尝试 (Final Attempts)

If you can’t get your internal webcam working, you might want to consider reinstalling macOS from scratch just to make sure it’s a hardware issue. However, be sure to back up your Mac with Time Machine before you reinstall, so you’ll be able to restore all your personal data.

如果您无法使用内部网络摄像头，则可能要考虑从头开始重新安装macOS，以确保这是硬件问题。 但是，在重新安装之前，请确保使用Time Machine备份Mac，这样您就可以还原所有个人数据 。

In a pinch, you can use your iPhone as a webcam, or use capture devices to turn your mirrorless or digital SLR camera into a high-quality webcam.

紧要关头，您可以将iPhone用作网络摄像头 ，或者使用捕获设备将无反光镜或数码SLR相机变成高质量的网络摄像头 。

Failing that, you can always just buy a new external webcam.

否则，您始终可以购买新的外部网络摄像头 。

翻译自: https://www.howtogeek.com/682516/mac-camera-not-working-heres-how-to-fix-it/

mac uvc相机