This is timely. I just searched your name and your '123d catch'. I finally installed it... Sort of. There is till no mac version. But they have a browser app that I got a plugin for.
Not really in love with the results on line I have seen over all. I think its a good way to get a very detailed base mesh. You can also import directly into Mudbox and sculpt and paint over the mesh as one workflow. So hopefully Ill get something I like soon.