Hi,
thanks for all your help, I have now got it running.
The answer was in the security settings: Apple/system preferences/security and privacy/general. In there was the alert:?
Future Technology Devices International Limited was blocked from loading? - Allow.
I had not seen this message at all, although I had gone into "security and privacy", but I think I just went to the "privacy"
column and not the general. Not sure how anyone would now about looking here.
Anyway, everything else I did was OK, and now I can read and write cvs etc.
The serial port selection now has cu.usbserial-FTVDZY97 as an entry, which was missing before.
again , many thanks - problem solved
regards
Robert