As suggested on one of the dev threads, I've used a pre-release qt from: ftp://ftp.trolltech.com/qt/snapshots/qt-mac-free-3.3.6-snapshot-20060311.tar.gz This took care of the "bus error" and mythfrontend launches and appears to be working fine until I try to play a recording or watch livetv. It segmentation faults at that point.