iCloud contacts keep duplicating, now into the thousands! Have tried merging on my MacBook but they keep duplicating

my iCloud contacts just keep duplicating and are now over 30,000 and growing. I’ve tried going on my MacBook and going into contact cards and using the merge option but because the contacts are just rapidly duplicating it just keeps getting locked. HELP😩



MacBook Pro 13″, macOS 12.6

Posted on Dec 28, 2022 05:16 AM

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Posted on Dec 29, 2022 09:37 AM

The cause how thousands of contact were created in Mac and iPhone is Mac OS contact data base is corrupted and same repeated contacts are reflected in www.icloud.com , iPhone / in Mac address book .

The Mac OS has to be erased and reinstalled Erase and reinstall macOS - Apple Support

Note : possibility if a user creates few duplicates contacts , they can reflect in address book , but not thirty thousand contacts and that are increasing continuously .

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Question marked as Top-ranking reply

Dec 29, 2022 09:37 AM in response to MarkWW22

The cause how thousands of contact were created in Mac and iPhone is Mac OS contact data base is corrupted and same repeated contacts are reflected in www.icloud.com , iPhone / in Mac address book .

The Mac OS has to be erased and reinstalled Erase and reinstall macOS - Apple Support

Note : possibility if a user creates few duplicates contacts , they can reflect in address book , but not thirty thousand contacts and that are increasing continuously .

Dec 29, 2022 07:43 AM in response to MarkWW22

Hello MarkWW22, 

Thank you for posting to the Apple Support Communities. 


You may need to repeat these steps several times on your Mac until no duplicates exist If you see duplicate contacts after setting up iCloud Contacts:


"On your Mac

  1. Make a copy of your contacts.
  2. Open Contacts.
  3. From the Card menu, select Card > Look for Duplicates.
  4. When asked, click Merge.
  5. Repeat steps 2 and 3 until no duplicates are found.
  6. Make another copy of your iCloud Contacts."


All the best! 

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iCloud contacts keep duplicating, now into the thousands! Have tried merging on my MacBook but they keep duplicating

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