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I am running Leopard that I upgraded from Tiger.

I've been noticing that every once in a while the SyncServer process starts up and eats up all the CPU. The fans will start going at full blast and the laptop will slow down to a crawl. I need to force quit the process from Activity Monitor to get it under control. It disappears for a while, but eventually gets started again.

I do have an iphone as well that I sync so I'm wondering if syncServer might be an apple process checking for my phone plugged in.

Edit: Tried iSync and the manual resetsync as suggested, but got this output:

$ /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/ full

2010-03-12 08:03:50.230 perl[176:10b] SyncServer is unavailable: exception when connecting: connection timeout: did not receive reply

PerlObjCBridge: NSException raised while sending reallyResetSyncData to NSObject object

name: "ISyncServerUnavailableException"

reason: "Can't connect to the sync server: NSPortTimeoutException: connection timeout: did not receive reply ((null))" userInfo: "" location: "/System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/ line 16" ** PerlObjCBridge: dying due to NSException

And during that syncServer started spinning up 95-100% just like it always does.

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Do you use Mobile Me or iSync for syncing with any devices (beyond your iPhone)? – Chealion Mar 12 '10 at 20:48
I don't use Mobile Me or iSync for anything other than the iphone. I'll do some backing up and try out deleting that folder. thanks for the suggestion – user30752 Mar 13 '10 at 15:25
up vote 1 down vote accepted

You could try this :

Open iSync. Choose Preferences from the iSync menu. Click Reset Sync History. If this does not resolve your issue, or if you are unable to open iSync, follow these steps:

In the Finder, choose Utilities from the Go menu. Open Terminal. In the Terminal window that opens, type or paste the following command on a single line: /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/ full Press Return. When the operation is complete quit Terminal.

After you have reset the SyncServices folder, you may need to re-enable some Sync-related settings. Resetting SyncServices resets your Mac OS X User Account's Sync settings and any local history of updates and changes to Sync-enabled data. It won't change your current data sets, but it does delete the history of how the data arrived at its current state and disables some Sync-related settings.


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Thanks for answering. Unfortunately neither of those options worked. See the edited question for the full error message. – user30752 Mar 12 '10 at 13:07
You mention you upgraded from 10.4 to 10.5...If you are are getting ugly error output like that in the Console or Terminal... I might suggest doing a clean install of 10.5 after backing up your data... Drastic...but if it's barking at stuff in the Frameworks...I'd go that route.... – CaseyIT Mar 12 '10 at 13:14
I decided to wipe the hard drive and do a fresh install of snow leopard. Accepting this though... – user30752 Apr 17 '10 at 21:25

If you aren't using Mobile Me:

You can try deleting the folder ~/Library/Application Support/SyncServices - in my experience it has fixed similar issues. It comes with a big caveat however; Apple themselves says "As if it were a swarm of bees, you should stay away from the SyncServices folder." (Source)

So be sure to backup your address book and calendars to be on the safe side and then go ahead and get rid of the folder.

If you're using Mobile Me:

Try unregistering all your computers in the Mobile Me System Preference and then reset your Sync Services using iSync.

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