MacBook image/video acquisition

I try to use image acusition toolbox to record a video/image using my macbook build in camera. The first two command run correctly but it crashed whenever I run the command of 'obj = videoinput('macvideo',1);'.

Could you advise howto solve this issue?

>> imaqhwinfo

ans =

struct with fields:

InstalledAdaptors: {'macvideo'}

MATLABVersion: '9.7 (R2019b)'

ToolboxName: 'Image Acquisition Toolbox'

ToolboxVersion: '6.1 (R2019b)'

>> camList = webcamlist

camList =

1×1 cell array

{'FaceTime HD Camera'}

>> obj = videoinput('macvideo',1);