Wanted to chime in that this solution works like a charm.
I have MC 5.5.3 on OS X 10.6.8, and FCS and now Premiere Pro running on the same tower. As soon as I installed my Matrox MXO 2 LE, Avid wouldn’t load. I removed “MacFlamethrowerMXO2.bundle ” and things work like a charm.
Thanks a million! Was starting to tear my hair out over this!