Thanks for the suggestions.
I have disabled Little Snitch and rebooted the iMac - and still iCloud Drive is "Setting up ..." without going anywhere under System Preferences.
Under Activity Monitor the only processes seemingly related to "iCloud" are:
com.apple.iCloudHelper
com.apple.preferences.icloud.remoteservice
iCloud Photos
Force quitting those seems to make no difference as when i open iCloud Drive in System preferences it again just sits with "Setting up ...".
If I click on the iCloud icon in Finder's sidebar I get the iCloud Drive icon and the legend "Setting up iCloud Drive /..." with the spinning wheel ad nauseam - it goes no further.
There is no iCloud icon on the desktop itself.
When you say "rerun the iCloud setup" just how and where would I find that?
I have a feeling that I am being stupid and overlooking the obvious, but if that is the case then so be it!
Last edited by iBozz; 10/25/14 10:03 PM.