iMac Facetime built in camera

By Amron32 ·
Tags: Security
I have a brand new iMac desktop computer. The built in camera's green light goes on (so it works) but the image is not projecting. I get a black screen. This problem occurs with Skype, PhotoBooth, Facetime & Zoom. I have done most troubleshooting to no avail. The computer OS is Catalina. Does it need to go to a medic? Thanks.
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FaceTime Camera

by appltech In reply to iMac Facetime built in ca ...

Because you’re getting a black screen, I’m assuming it’s not a FaceTime issue but an iSight camera issue. I don’t know if you’ve done troubleshooting for cameras not working on Mac so I’ll outline a few non-obvious steps that you might find useful.
Restart your Mac in Safe Mode. This might help you to pin down any software that causes the problem upon startup. To launch Safe Mode, restart the Mac and hold Shift while it’s booting;
Try Terminal - go to Applications → Utilities → Terminal. Type in sudo killall VDCAssistant and press Enter. It will reset the camera daemon and all the apps that utilise it;
Reset the SMC. I’m assuming your iMac has a T2 security chip so I’ll give the steps for that. Shut down the Mac and hold the power button for 10 seconds, then turn the Mac back on. Turn it off again. Hold Shift + Control + Option for 7 seconds, then add the power button to the combination and hold for 7 more seconds. Release and turn the computer back on;
Run Apple Diagnostics to identify any hardware problems with the camera. Disconnect any external devices from the Mac and restart it. While it’s booting, hold the D key until you see a language screen. Select your language and wait for the scan to finish. Camera problems are identified by one of these codes: NDC001, NDC003, NDC004, NDC005, NDC006. If you see one of those, take the Mac to a service centre.

If nothing works, you probably have a virus. In this case I advise a malware scan, but you have to pay for a cleaning app.

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