Another application might be opened where the camera is activated. If that is the case then quit that application in order for you to use the camera. Maybe something like skype is opened......
The camera built into current Macs (including the iMac, the Macbook, the Macbook Air, and the Macbook Pro) is known as the iSight
Yes. The new Macbook Air does have a frontward facing FaceTime camera.
Yes, There is a camera
In older MacBook Pro models, it was located within the speaker grills. In newer MacBook Pro models, there is a tiny dot to the left of the iSight camera. This is the ambient light sensor - not the camera itself as is widely mistaken.
Yes they are, just plug your camera in, and you are ready to go!
Nope. Not without buying additional software.
She uses her webcam a lot. She has a MacBook by Apple.
The MacBook Air has a built in iSight camera. To add another camera you would need to specify what you wanted to achieve that you could not with the iSight.
An iSight is the physical camera on a MacBook, MacBook Pro, or iMac. Facetime is an application in OSX (Mac Computers) and iOS (iPhone, etc) that allows users to place video calls. As of recent, Apple has updated the iSight to support HD video, and it is now referred to as a "FaceTime HD Camera."
Plug it in via USB then use Image Capture to import.
Take it to the nearest Apple store, along with a bunch of shekels, and hope for the best.
This is entirely dependent on the year of the MacBook. The new 13" MacBook Pro Retina keyboard is not the same as the regular 13" MacBook Pro. You also wouldn't be able to interchange a keyboard from the older 13" MacBook models (white MacBooks) with a recent 13" model.