http://tascam.com/content/downloads/products/308/FireOne_Release_Notes_1_00.pdfdid u examine the release notes?
release notes are dated 2007-07-15
applications "Current" at time of release:
sonar 7
live 7
reason 4
logic pro 8
m-powered 7.3
digital performer 5
cubase 4
nuendo 4
its most likely that this interface was designed for use with these apps..
all of which are pretty much the extent of how far u would want to push a g4 into osx territory
it may be better to aim for intel mac osx as this was also "Current" around 2007 time
Windows XP is probably the best thing to use with such an interface.
would allow you to use close to current software versions and higher level of cpu power.
tascam was one of the last manufacturers to create interfaces still being compatible with os9..
eventually they gave up tho supporting something so old... its amazing that they made the fw-1804
compatible with os 9 in the first place.. they did this in 2006!!! 2006 is definately the cut off point
for os9 compatible devices.. at least thats what my research efforts have led me to believe!