Hello Ant,
My name is Joanna, I’ll be happy to help you out today.
A. Have you try the following:
- Unistall and install the app
- Clear Cache
Clear Teams cache in macOS
If Teams is still running, right-click the Teams icon in the dock, and then select Quit, or press Command (⌘)-Q.
In the Finder, open the /Applications/Utilities folder, and then double-click Terminal.
Enter the following command, and then press Return:
rm -r ~/Library/Application\ Support/Microsoft/Teams
Restart Teams.
B. Check if your camera is in use
To make sure you can use your camera in Teams:
Close all other apps that might be using your camera (like Skype or FaceTime).
If you’re using an external camera, try unplugging it and plugging it back in.
You can often save time and effort by restarting your device.
C. Check your app permissions
You might need to change one of your device permissions.
Open System Preferences
Select Security & Privacy
Under Privacy, choose Camera on the left
Make sure Microsoft Teams is selected
Close all apps and restart your device
Note: These settings only apply to Mac OS 10.14 and higher.
Please let me know if this doesn't work or if you need further assistance.
Thank you.