The tricky bit for OS X is that there isn't a virtual webcam driver for it. (Someone posted a proposed bounty last month: https://news.ycombinator.com/item?id=2

The tricky bit for OS X is that there isn't a virtual webcam driver for it. (Someone posted a proposed bounty last month: https://news.ycombinator.com/item?id=22686333 https://news.ycombinator.com/item?id=22686333) You can do this today on Windows and Linux, I believe.