I have a MACPRO which I previously had connected to a MOJODX I/O. For a while we were running the AJA I/O Express on the MacPro because we needed to output from FCP. I have recently put the MOJO back on because a software issue required us to back out to MC 5.0. Now the system crashes on bootup if the mojo is attached. The host light on the mojo flashes constantly and if we connect the cable after the system has booted there is no connection. I have tested the cable, the PCIe card and the MOJODX on another system and it works fine. I have also removed all of the AJA drivers in case there was a conflict. I need some more ideas. Love to hear yours!