reading linux from MacOs
any mac os can´t see by now your linux disk/partitions. maybe never.
you should update for os 9.1, because earlier version are lightly buggy.
if you want to see/work on/change files of any type between os 9.x and
linux, make a drive/partition pc dos compatible (be warned not too big,
it depends on what os you use, range from 256 mb up to 1,5 gb) a good
value is 512 mb and is big enough for file transfer. put the driver for
dos/fat file system into your kernel, or load it if you need it. thats
it. both system can write on this drive/partition without any risk of
your data, and both system can see it.