Thanks for such a quick response dynamicv. I am quite to new to Macs- is it likely that it would thus work with my version? I think I can get one for about seven dollars so there are not any high-sunk costs in checking.
Just dug mine out of an old parts bin and tried it within 10.5.3 on an Intel iMac. No joy. It may work with a PowerPC model, but otherwise it's not the adapter for you.