qApp->sessionId() does not gives session id on Mac OS X

hi,

I am working on application where i need session id of the application.
qApp->sessionId() gives me the session ID which is unique for multiple instance of the same application.

But this does not work on Mac OS X. On Mac OS X it gives the empty session id.

Any idea why this is happening. ANd is there any other solution?


regards,
~Sanjay

I think it only works on X11.