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Test a computer camera in the built-in app first — Windows Camera or Mac Photo Booth — then check the self-view in the app you plan to use.
For the full breakdown, see our best Computer Camera guide.
A black camera tile has a way of showing up two minutes before a call you can’t miss. Most of the time it isn’t bad luck. Testing inside the meeting app is the usual approach, and that test can lie. A dependable way to test your computer camera is to start where the operating system itself does — Windows Camera on a PC or Photo Booth on a Mac — then open the app you’ll actually use.
That two-layer check answers both questions that matter: does the lens work, and is the software allowed to use it.
Why Test In The Built-In Camera App First?
Built-in apps are the straightest path to the hardware. Windows Camera and Photo Booth open the lens directly, with no meeting servers, browser permissions, or device-selection menus in the middle. If the preview looks normal there, the physical camera is working.
A meeting app can mislead you. A gray self-view could mean broken hardware, but it could just as easily mean a blocked permission, the wrong camera selected, or another program holding the lens. Microsoft’s camera testing guidance applies the same logic: a live preview in the Camera app confirms the internal camera functions, and a black or error preview confirms the camera still isn’t working correctly.
The University of Colorado Denver’s webcam guidance adds one useful habit: close every other program that uses the camera, and reboot if you can, so no second app holds the lens open without you knowing.
Testing A Computer Camera On Windows And Mac
Use the operating system’s own app as your hardware check, then check privacy settings, then test the app you actually need.
Windows: The Camera App Test
- Click Start, type Camera, and open the app.
- Allow camera access if Windows prompts you.
- A live preview means the internal camera is functioning.
- A black screen or an error means the camera still isn’t working correctly.
If the Camera app itself fails, the fix at the end of this article starts with Windows Update and optional driver updates. Skipping those can leave a working camera invisible to every app. If the Camera app works but another app shows nothing, the issue belongs to that second app: grant it camera access and select the correct camera device in its settings.
Mac: Photo Booth Plus A Permission Check
Open Photo Booth or FaceTime. If your face appears, the built-in camera works. If the preview stays black, go to System Settings > Privacy & Security > Camera and turn on access for each app that needs it. Older macOS versions use System Preferences > Privacy > Camera. Screen Time can block the camera even when privacy settings look correct, so check its restrictions too. Apple’s camera troubleshooting guide walks through this same order.
After the built-in test, open the app you plan to use and give it permission when macOS asks. A clean self-view there means the whole chain is ready.
Still Black? Work This Fix Order
If the built-in preview still fails, work the table from top to bottom. Most cameras come back by the second or third row, so don’t reinstall drivers before ruling out simpler causes.
| Symptom | Most Likely Cause | First Fix To Try |
|---|---|---|
| Windows Camera shows a black screen or an error | Missing or outdated camera driver | Run Windows Update, install optional camera and driver updates, restart |
| Photo Booth or FaceTime shows no picture | Camera permission is off | Check System Settings > Privacy & Security > Camera, plus Screen Time |
| Built-in app works but a meeting or browser
|