Are you running Mac OS 10.7 and the camera is not working, try the following steps to resolve the issue.
- In the Finder, click the Go menu.
- Choose Move to Folder …
- In the window that opens, enter / Library / QuickTime.
- [ click on Go]
- Delete the following files:SN9C201 WebCam.Component Sonix
Sonix SN9C102p WebCam.Component
DesktopVideoOut.Component
VideoGlide.Component
3IvxVideoCodec.Component