OK thanks for getting back so quickly, to be honest it was a bit of a shot in the dark.
I haven't used the Mac for a few months, so will get it upgraded on Saturday to the latest OS and try again - it may be that MacOS has some increased controls / security that have crept in since I last used PSUD on the Mac.... I'll upgrade then go through a full install again. More news soon.
Regards,
Duncan
