Yes, it only runs on 90% of desktops.

What a weird response. I meant it as a disappointment that I couldn't see it in action being on OSX.

That kind of response will never get you any mod points. Accuse him of pandering to the lowest common denominator, bonus points if you quote pg.

Photosynth is a website, not a desktop app.

I think he means that it's a (Windows) plugin for your browser. Both the picture uploader and the viewer are Windows-only for now.

I did notice that as well. But I got a Windows only message when trying to give it a whirl.