I cannot get opus 1 to work with mach 5 (and DP 4.12 and my mac g5). The people at motu told me that opus one is for pc's and that I should take it back to the store where I bought it so that they could decompress in order that it can work with my mac g5. The people at the store told me to use the stuffit utility of the mac g5 to decompress it, and that doesnt seem to work either (I get a message telling me that the opus 1 files cannot be opened or converted because they are broken). This is like trying to push a boulder through a swamp with lead boots attached to my feet. Any suggestions would be very much appreciated. Thx OJ