Address Book Source Sync preventing sleep

Discussion in 'OS X El Capitan (10.11)' started by tommiy, Sep 16, 2016.

  1. tommiy macrumors member

    Dec 11, 2015
    While I've been trying to resolve my issue regarding crashing on wake from hibernation I've discovered that my MAC Air states that it can not sleep properly due to "Address Book Source Sync" happening.

    If I do a pmset -g assertions

    I see that the pid for AddressBookSourceSync changes every 30seconds and it continues indefinitely. I've tried numerous attempted resolutions from google search which includes deleteing the cache and the actual contacts database however even with these removed it appears that this process keeps running indefinitely forever.

    The only way that it seems to disappear is if i enable icloud and sync contacts. Then it is happy. However, as soon as I disable iCloud by log out the issue returns.

    This only started happening when i went to ElCap and I'm now almost at my wits end with El Cap and going to head back to Yosemite due to the El Cap issues (this and crash from sleep).

    Any help appreciated on how to stop el cap \demanding that it has to sync to icloud to go to sleep.
  2. tommiy thread starter macrumors member

    Dec 11, 2015
    seems like stopping the agent, deleteing the files and cache and then restarting the agent has fixed this....well for now at least.
  3. Benz63amg macrumors 68020


    Oct 17, 2010
    New York, NY
    Can you give me step by step details on how to stop this process from preventing my iMac from going to sleep? i got the exact same problem
  4. msvadi macrumors 6502

    Aug 12, 2010
    This is very helpful. I was having the same issue, and enabling "Contacts" for the iCloud account seemed to solve the problem.

    I don't really use iCloud for contacts, but I don't mind having it enabled. At the same time, it's ridiculous that disabling contacts sync for iCloud would mess app the sleep function.

    By the way, I'm on macOS Sierra.

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