how can i interface a camera of mac with matlab 2015b?

I am able to see my webcam using:

>>webcamlist >>mycam=webcam but I can't using video input.

Using imaqhwinfo I get:

>> imaqhwinfo ans = InstalledAdaptors: {'dcam'} MATLABVersion: '8.3 (R2014a)' ToolboxName: 'Image Acquisition Toolbox' ToolboxVersion: '4.7 (R2014a) >>imaqhwinfo('dcam') ans = AdaptorDllName: '/Users/Fredy/Documents/MATLAB/Su...' AdaptorDllVersion: '4.7 (R2014a)' AdaptorName: 'dcam' DeviceIDs: {1x0 cell} DeviceInfo: [1x0 struct] >> obj=videoinput('dcam') Error using videoinput (line 233) There are no devices installed for the specified ADAPTORNAME. See IMAQHWINFO. Using >>webcamlist I get the following information

>> webcamlist ans = 'FaceTime HD Camera' How can I access my webcam using video input

I have also tried:

>> obj=videoinput('FaceTime HD Camera') and it didn't work.