How do I clean up and fix Contacts database on my MacBook Pro?

My contacts on the MacBook Pro is getting VERY SLOW and crashing regularly.

I suspect the database needs to be cleaned up.

How do I run a cleanup to fix the database?

(I don't know if it is a B-tree, hashing database, etc. There used to be programs that would REBUILD these databases. I need this.


Thank you



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MacBook Pro 16″, macOS 15.4

Posted on Apr 21, 2025 9:25 AM

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Apr 27, 2025 6:43 AM in response to raidl

No advice for you, but just to say, I'm looking for the same.


After about 10 seconds in the Contacts app it beachballs, which makes it very difficult to edit cards. I suspect over the time I've been using macOS contacts (since back when it was Address Book in the Mac OS X 10.2 days) the database it uses has become corrupted. Which is understandable with a database that is 20+y old. The question is, how to get it into shape? For context, I'm using iClouds to sync my contacts, I have about 1600 cards and when I export my contacts to an abbu file (as described in the "rebuilding your contacts" procedure found elsewhere on this site) it is 41MB. That procedure did not help with the beachballing, btw.

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How do I clean up and fix Contacts database on my MacBook Pro?

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