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OS X: Resetting Sync Services

Symptoms

You may need to reset Sync Services if a single user account is experiencing one of the following issues while using OS X Mountain Lion or earlier:

  • Unable to open or use the Sync menu
  • Unable to open iSync in a particular OS X user account
  • SyncServer or Mingler uses excessive resources on your computer

Note: Resetting Sync Services is not an appropriate troubleshooting step to resolve iCloud issues.

Resolution

Important: Manually removing or editing the contents of ~/Library/Application Support/SyncServices/ is strongly discouraged because this may lead to unexpected data loss. Prior to resetting Sync Services, it is strongly recommended that you back up any important data that you sync regularly.

Choose your operating system for steps to reset the SyncServices folder:

OS X Mountain Lion

  1. In the Finder, choose Go > Utilities.
  2. Open Terminal.
  3. In the Terminal window, type or paste the following command on a single line:
    /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync.pl full
  4. Press Return.
  5. Quit Terminal after the operation has completed (when Terminal returns to the command prompt).

OS X Lion and Mac OS X Snow Leopard

  1. Hold down the Option key on your keyboard and click the Sync menu (Sync menu icon) in the menu bar. 
  2. - If you do not see the Sync menu in your menu bar, skip to step 6.
    - If you see the Sync menu but you are unable to open it, skip to step 7.
  3. Choose Reset Sync Services from the Sync menu.
  4. Click Reset Sync History in the window that appears.
  5. Test for the original issue. If the issue persists, or if you are unable to open the Sync menu, follow the next set of steps.
  6. In the Finder, choose Utilities from the Go menu.
  7. Open Terminal.
  8. In the Terminal window, type or paste the following command on a single line:
    /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync.pl full
  9. Press Return.
  10. Quit Terminal after the operation has completed (when Terminal returns to the command prompt).

 Mac OS X Leopard

  1. Open iSync.
  2. Choose iSync > Preferences.
  3. Click Reset Sync History.

If this does not resolve your issue, or if you are unable to open iSync, follow these steps:

  1. In the Finder, choose Go > Utilities.
  2. Open Terminal.
  3. In the Terminal window that opens, type or paste the following command on a single line:
    /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync.pl full
  1. Press Return.
  2. Quit Terminal after the operation has completed (when Terminal returns to the command prompt).

Re-enabling sync-related settings after resetting Sync Services

After you reset Sync Services, you may need to re-enable some Sync-related settings. Resetting Sync Services resets your user account Sync settings, and any local history of updates or changes to sync-enabled data. It doesn't change your current data sets, but it does delete the history of how the data arrived at its current state. It also disables some sync-related settings. Here are a few things you should check that may need to be reactivated if you plan on using sync again:

  • If you are syncing with an iPhone, iPad, or iPod using USB and iTunes, you should re-enable any settings for syncing data in iTunes. This includes Bookmarks, Calendars and Contacts. You can check these settings in iTunes the next time you connect your device.
  • If you are syncing with a third-party application, you may need to reconfigure your sync options in those applications.
  • After resetting sync history, OS X treats the next sync as if it is syncing for the first time for the affected user. For example, the next time you sync via iTunes, you may see a dialog asking if you would like to: Merge Data, Replace Data on Device, or Replace Data on your computer. In general, Merge is the default behavior for this dialog, and is the preferred choice on first sync. Avoid selecting the Replace option unless you have a specific reason to replace the data on your device.

 

Additional Information

The SyncServices folder (~/Library/Application Support/SyncServices) is a key component of syncing in Mac OS X Leopard, Snow Leopard, Lion, and Mountain Lion. This includes syncing with devices and third-party applications. You should not alter the SyncServices folder directly. If you need to troubleshoot Sync Services, use the steps in this article and related documentation instead. 

Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple’s recommendation or endorsement. Please contact the vendor for additional information.
Zuletzt geändert: Oct 24, 2013
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