From the FAQ at the Jing Project (which looks pretty neat), the answer for "Did you say this runs on a Mac?":
You bet. It would be rather silly of us to think we could conduct a public test on improving digital conversations and only invite one platform to participate. We realize for this to be successful, we have to be as platform-independent as possible. Sorry, no Linux support.
Emphasis mine. I love the idea of writing a paragraph in which you talk about something and then completely disregard it in the final sentence. "Do you like me?" "Of course! I like you a lot! Oh, but I sort of hate you."