New answers tagged webcam
To disable iSight and other cameras, use: sudo kextload /System/Library/Extensions/AppleCameraInterface.kext (tested on 10.9) I'm not aware of a way to disable audio input without affecting output. It's the same hardware so unloading/removing the kext probably won't work. One step you can take is to turn the input volume down to zero in your sound ...
I think you can specifically target your iSight camera by (re)moving /System/Library/QuickTime/QuickTimeUSBVDCDigitizer.component According to this: http://www.macosxhints.com/article.php?story=20070323094959262 The link does mention that it is 10.4 specific and I haven't tried it under 10.8/10.9 but it's a good place to start.
Any software that so chooses may ask you to initiate a FaceTime session. It cannot start one without your say-so. The FaceTime cameras (like yours) cannot be active without the LCD on. There aren't really any hacks that matter. There are a number of really lame, goofy hacks in some web plugins (Flash), that could be used to access a Flash player that ...
The trivial non-technical way which works in all cases is to put a small piece of black electrical tape over the camera. Then, even if a program manages to change the settings to turn the camera on, the camera will not be usable. To re-enable the camera when you want to use it, remove the tape.
Top 50 recent answers are included