Contacts disappeared after upgrade to Mountain Lion

Nicholas,

Try Contacts>Preferences...>Accounts...remove {-}/re-add {+}your iCloud account.

Nicholas,

Go through the procedures listed in iCloud: Troubleshooting iCloud Contacts.

simillar problem. Since upgrading to mountain lion most of my contats in Cotacts on the mac (used to be called AddressBook) have lost all their data excepth for the name. The data is still intact on icloud and my iphone. I tried all kinds of methods to solve this but nothing helps. One point which might be significat is that if I export a contact that is missing the data to a vcard and open the vcf file in an editor I see al the data is there, but if I try to import the vcard, it imports only the name.

any ideas?

Had precisely this problem and found the answer on another thread--here's the copied text.

No clean install was necessary. In System Preferences uncheck all items in iCloud. From the Finder menu click >Option Go which shows the Home Library Folder in the pull down menu. Open the Folder Application Support find the Folder Address Book and Trash it with all its content.

Return to the System Prefs re-activate Contacts and Mail and on launch Contacts are added correctly from iCloud and sending a message in Mail works normal with names presented in the To field from Contacts.

Hi I had the same problem when an upgrade .i tryed to trash from the library all contact files but no result.

Anyboldy has other ideas?

Same problem...upgraded to ML, lost contacts. This technique worked for me, thanks.

This worked for me:

Go to user->library->applicationdata->adressbook->metadata, just open one of the many contact files stored there, for me it opened adress book and: poof all my contacts were there.

No idea why this worked though, might just work for me...

I would like to try this method, but I can"t find Contacts or AddressBook un my library ………

It's Library -> Application Data -> AdressBook

Try following the steps I posted here: After Lion upgrade, my addressbook does not work++

Unfortunately, it doesn't solve the problem

after deleting the file, i went to System Pref to tick the box "Contacts", and the same, the mac is working ……… and finally crashing !!!!

i don't know what to do :-(

I don't know what to do, iCloud is still not working with contacts, the rest is okay !!!!

i tried your method, but it doesn't fix anything :-(

do you have some solutions ??

First, dig into the Source folders inside the AddressBook folder. Look in all the metadata folders. Make sure there are files in those folders. There should be one file for every contact, plus groups. They are named with unique identifiers, so you won't be able to tell what they are without quicklooking them.

If those files exist, find and delete every adressbook-v22.abcddb in each of the subfolders of Sources and the main AddressBook folder. Then, start Contacts and see if your contacts have returned.

If those files don't exist, or that didn't work, you need to recover the AddressBook folder from a Backup.