to say that it just doesnt work is obviously not correct
the product was reviewed in many differnt magazine publications
https://www.soundonsound.com/reviews/m-audio-firewire-410obviously it worked at that point in time and should be able to work now
if it didnt work in os9 they would have reported that fact as the article above
explicitly mentions macos 9.2 and the box itself says 9.2.2 right on it so obviously it did work
unless there actually was a firmware update that most people used that rendered the box incompatible
but i cant find the existance of any firmware update for the firewire 410 that could have ruined os9 compatibility
if the firmware file cant be found; then its still possible that there was seperate batches of these interfaces made at different times back in the 2004-2005-2006 time period resulting in different versions of firmware direct from factory, but all of this is speculation
are u powering the device with its original Power supply? or powering the device from its Firewire connection? i just read that the box claims it can be powered via the firewire connection.
does anyone have a copy of the original driver cd? (photo attached)