converting Sd2 files to wav on mac?

any one know a simply way to convert old projects or just sd2 files in to wavs? I have some recalls to do with have old SD2 files .. I am on OSX v10 on my 2 main mac's



i can't even remember which version of Mac OS supported sd2 files



any help would be great, I do have an old G4 or G5 about somewhere I may try to fire that up and see what happens .