I transferred the Solid State Drive to a similar PC and loaded the system without incident, but iMessage does not work.
There seems to be a problem connecting to iCloud or Contacts, since if I create New text message, typing into the To: field does not bring up Intellisense. By this I mean, it does not mater what I type, not contacts pop up. If I try and paste a phone number, it disappears.
What must I do to get it working again on this other machine?