Much appreciate your welcome, WJ!
About three years ago my Son-in-Law and I bought the same Umax Powerlook II Scanner and he plugged his into his Mac and I did the same with mine to my PC through a mini-SCSI card. We both used the bundled MagicScan software. I have upgraded to W2K and a proper SCSI card and my scanner works well. It's PhotoShop I'm suspicious about.
He's upgraded his Mac and says;
"I have not attempted to connect the original scanner to the iMac on the recommendation of scanner manufacturer. The iMac only has firewire and USB ports and they did not recommend trying to use an intermediary to connect the scanner."
He also says;
"Some new iMacs have just come out, but there is talk of a major revamp to the range that is supposed to happen early next year. I think the present lot are good and well thought out machines that run well on operating system 9.1. The newest operating system Mac X has recently come out and works in quite a different way. As yet there is little software available specifically for it and I think it needs particularly high clock speeds to work well – I will not be using it for a while yet."
He's a Radiology Consultant and Lecturer so this is important to him professionally.
Can you enlarge on this?