Connect any webcam to your Mac
If you're having problems getting a webcam to work with your Mac, then try installing USB WebCam Driver.
USB WebCam Driver works with most major webcam manufacturers. This trial version however is limited to 30 minutes at a time which means you have to unplug and reconnect your camera to keep using it. Please note that unless you have a FireWire or Philips camera, your serial number is tied to the computer you register on, and you'll need that to register the driver if you intend to keep it.
Installing the Driver
You don't have to have your camera connected when you install USB WebCam Driver but you may need to identify the type of camera you have before the driver will recognize it. Just change the name that appears in the QuickTime Video Settings dialog.
If you're suffering from webcam driver problems on your Mac, USB WebCam Driver may be your solution.
Get alternatives to USB WebCam Driver
Video-conference with your usb webcam