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I'd like to share a single application (or window) via VNC so I can have another user use an application on my OS X box.

The closest thing I've found is SharedAppVNC but it doesn't seem to play well with other VNC clients (it uses its own)

Alternatively I could use a VNC server that simply lets you adjust the resolution so I can force a certain area of the screen to be shared (however this is not ideal).

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Why are you trying to share only one application via VNC? – Josh K Mar 6 '10 at 20:18
If it's an X application, just start it up in the window manager inside the VNC server display … – Nerdling Mar 6 '10 at 21:04
Nope, it's a Cocoa app, one I can only run on OS X. Why you gotta ask so many questions :) – sehugg Mar 7 '10 at 6:16

Besides the application listed I don't think so.

You may however be able to send it over SSH as an X11 application, but I have little experience with that.

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The application would have to be written to support such a thing as the OS does not.

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