Nuendo can't find rewire plugins

which program you need to authorize again? Nuendo or Your ReWire Applications? And how? I can’t see my Waves Rewire Option in the device menu… and also another program (Source Connect that requires a ReWire configuration) is not present in that list… Help please. I have recently change my motherboard on iMac 27’’ Mavericks. Before this passage I had the ReWire Options. Thank u