UV5XP....
    However to get CHIRP to see the radio either in the 'Download from radio'
    or 'Upload to radio' ... with the cable plugged in to my PC or my MAC, the
    radio must me switched OFF...then as I select 'Download or upload' as I
    select 'OK' i must immediately switch ON my radio then CHIRP sees it and
    proceeds. If I try to 'Download or upload' with the radio already switched
    on I get the message 'The radio did not respond' as CHIRP cannot see it
    connected.
    Any suggestions?
    Thanks
    VE7ECJ