This worked for me - Thank you
TRANSLATION BY GOOGLE TRANSLATE
So I started by exporting to my Mac in vCard, all my contacts from the app "Contacts", (sic Quit Contacts) then I went in Users / Library / Application Support / AddressBook and I deleted everything he had it!
ADDED: I switched off Contacts in my iCloud account in Preferences then Restarted "Contacts" again
I then re-started "Contacts", I booted the iCloud account I wanted to see in my contacts and contacts that were on cloud returned in "Contacts" and also in the file that I had previously drained !
But do not forget to export your contacts from your Mac before emptying the folder "AddressBook" to be sure you do not lose them!
That and so I found my 3450 contact cards and modifiable Groups from "Contacts"
Have a nice day.
NOTE 1: I have four iDevices and on one of them running iOS7 as it is an iphone4, I had to switch off my iCloud Contacts, select Delete from iPhone, cold reboot my iPhone, then switch my iCloud Contacts back on again.All things worked. I then did a test run by changing an address on my Yosemite iMac, all four iDevices updated within a couple of minutes
NOTE 2: I had similar sync'ing problems with Yosemite iCal, here is what I did to fix this issue:
1 - Fire up iCal, File > Export > Calendar Archive
2 - Quit iCal, GoTo: /Library/Calendars - Trashed all Calendar Cache files
3 - Fired up iCal and Imported last Calendar Archive - All Cache fires were recreated automatically and interesting the main Cashed file was 1.5 Mb smaller.
All was good again