Michael CorganMy wife's MacBook Air has now refused to accept new contact details. It is possible to type in an intial entry for a new contact, but move to the next category and the new card disappears. This is regardless of whether you start with the First name, Surname or email address.
She is not signed in to iCloud so syncing is not a possible cause.
What remedy is there for stopping this? Most stuff online that i have found so far is concerned with contacts on iPads and iPhones.