How to Disable the iSight Camera (6 Steps)

Go to the System folder on the computer's hard drive. Inside the System folder, go to the Library folder. Inside the Library folder, go to the QuickTime folder. Go to the 'directory' and locate the 'QuickTimeUSBVDCDigitizer.component' file.
Create a 'Temporary Backup iSight' folder onto your computer's hard drive.
Copy the 'QuickTimeUSBVDCDigitizer.component' file to the new backup folder.
Delete the file in the directory by moving it to the trash. Do not delete both files--otherwise, you will permanently not be able to access iSight.
Open a web-based software program (iChat, Skype, Adium) and test to ensure iSight is not accessible.
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How to Use a MacBook Camera (11 Steps)

Navigate to the Applications folder in the Finder, then double-click on the Photo Booth application icon. When Photo Booth opens, you should be staring at a live image of yourself taken by the iSight camera.
Click on the red camera icon directly beneath the image. The app will provide a three-second countdown and will then snap a still photo through the iSight.
Click on the new photo that has just been dropped into the line of photos below the live image. A strip of menu icons should appear. Click on the various icons to either use the newly created image in a new email, import the image into iPhoto, make the image your new Account Picture, or make it your new Buddy Picture in iChat.
Click on the grayed-out camera icon, and it will turn red to let you know this function is active again. Click on the gray filmstrip icon to the left of the camera icon. The camera icon will turn into a video camcorder icon. Click this icon to begin shooting video with the iSight camera.
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