Brandtjc, do you get the error on the iMac even if the program isn't running on the other machine? That would be my expectation. It doesn't make sense that the demo license system wouldn't allow two demo copies on the network at once, but I could be wrong. In any case, I would shoot off an email to
omnigraffle@omnigroup.com if Joel doesn't respond here on the forum in the next few hours.