Had a great telephone convo with Gulio from Matrox. He offers up some troubleshooting advice for my issue:
As per our phone conversation;
1 ) Using the Uninstaller Utility- Uninstall the MXO software which was previously installed.
2 ) Shut down computer.
3 ) Unplug MXO’s AC Power and USB cable.
4 ) Power On computer.
5 ) Run Apple’s updater, Leopard Graphic Update and update Quicktime to version 7.4.5.
6 ) Shut down computer.
7 ) Power On computer.
8 ) After system has booted; power up and plug in MXO’s USB cable.
9 ) Download and install MXO 2.1.2 Drivers
10 ) When Updater asks to ‘Force Firmware Upgrade’, please proceed with it.
11 ) If it installs correctly- verify by going into MXO Control Panel and investigate MXO readings.
If you are still experiencing difficulties with your MXO, please feel free to contact us here at [number removed].
Keep me posted…
Thanks again for the tech support Gulio. My fingers are crossed that this works when I get home. But first, taking the G5 into the emergency room…