[willard202]

Thanks for the response.

Console.app, didn't "report" an error. I recognise the sound as being a "whatever you just tried to do, didn't work" warning. That said OF has created a "Synchronization Data" folder, which is a sign of some movement by the application.

I'm in 10.4.9. There is no Firewall tab in preferences/security, but there is one in prefernces/sharing. So I think you are giving me directions for 10.5. I don't see any options for "Set Access for Specific Services and Applications." Firewall was actually off. :o

Any more thoughts or things to try would be much appreciated.