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address book duplication

I hope someone can help me. I have updated my imac and my ios devices for the icloud. The calendar is working great. The problem I am having is that my address book had been duplicated. Everyone of my contacts are in twice (only on my imac). All my other devices are singular entries. Any thoughts on this?

imac, Mac OS X (10.5)

Posted on Oct 12, 2011 5:22 PM

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18 replies

Oct 12, 2011 8:38 PM in response to jamie199104

Ok, so I thought I had fixed this problem, guess not. I have updated my os to 10.7.2 and installed the ios5 on my ios devices. The ios devises and icloud are working great. My problems is with the address book and it has duplicated all my cards so I have twice as many contacts now. In addition, I have additional blank birthdays on my calendar. I use to have Mobile Me and I turned that off. I did try and turn off icloud and delete everything in my address book and then re-started icould address. It worked to eliminate the duplicated cards for about 5 minutes. Then came the blank birthday events on my calendar. Any ideas?

Oct 13, 2011 10:05 AM in response to mlrucci

The problem is you're viewing two accounts in Address Book, 'On My Mac' & 'iCloud'. Select 'Groups' from the View menu and you'll see the two accounts. You can also go to preferences and set iCloud as the default account. I have yet to determine if it's neccessary to have the contacts in both accounts or if we can delete them from 'On My Mac'.

Oct 13, 2011 12:00 PM in response to mlrucci

You can't delete the On My Mac account but it'll disappear once all the contacts and groups are deleted. Make sure they're all duplicated in the iCloud account before deleting.


When I go to the view menu and select Groups, I see all my groups and they're separated by account, a set of groups for On My Mac and a set or groups for iCloud. If you aren't seeing the multiple accounts then there could be a different issue.

Oct 18, 2011 7:32 AM in response to thebassman78

Well I also had this issue and did what all (before even seeing the responses. Well the other added issue of duplication is if one having outlook for Mac and if that is set to synch with the address book, it will reduplicate the names again and the on my mac contacts get filled again. This means that sync services with outlook and icloud will always cause duplication. I hope some one will have a solution to have outlook synch with icloud as a second option and not with just my computer.

address book duplication

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