No, it is not working. I have the same problem as DigitalREM. I tried every combination with Unity5.0 and 5.1 and Vuforia 4.2.3 and 5 in a MacBookPro in MacOSX 10.9.5 with buil-in camera and external camera and every time a click the Play button Unity crashes.

Thanks.

Unity 5.1.1f1 with Vuforia 4.2.3 and MacBook Pro with FaceTime HD Camera (Built-in) is working okay in Mac OS X 10.9.5 (Mavericks). As mentioned in another post, external webcams will crash when using Unity 5 running on Mavericks. Yosemite 10.10 only crashes first time after reboot when using external webcam. Perhaps Mountain Lion 10.8 is experiencing different crash. Do you have a Mac with Mavericks or Yosemite you can test on? See more info here:

https://developer.vuforia.com/forum/issues-and-bugs/vuforia-play-error-uniity-5#comment-2049474

http://fogbugz.unity3d.com/default.asp?685815_k82hj8es7qvnbvlr

Has anyone come up with a solution to the play mode crash? I am currently using Unity version 5.1.1f personal / vuforia 4.2.3/ Mac OSX 10.8. I am attempting to test my AR scene using the front face camera on my laptop. Yet, Every time i press play it crashes my scene. It does not crash when I remover my App Liscence Key. I am not sure of what the issue could be. I would love for anyone who has had the same issues to assist me. 

Thanks Community,

DigitalREM 

Has anyone come up with a solution to the play mode crash? I am currently using Unity version 5.1.1f personal / vuforia 4.2.3/ Mac OSX 10.8. I am attempting to test my AR scene using the front face camera on my laptop. Yet, Every time i press play it crashes my scene. It does not crash when I remover my App Liscence Key. I am not sure of what the issue could be. I would love for anyone who has had the same issues to assist me. 

Thanks Community,

DigitalREM 

My camera is internal,it's also crash

See this post:

https://developer.vuforia.com/forum/issues-and-bugs/vuforia-play-error-uniity-5#comment-2049474