Currently Being ModeratedJul 26, 2012 1:50 PM (in response to tjwolf)
I've had a similar problem with iCalExternalSync this afternoon, and I believe that I've solved it.
Quite briefly, the process seems to by trying to sync iCloud calendar but stalls somewhere. (At least, that seemed to by my problem). Maybe there is a compatibility issue between 10.7 and 10.8 calendars...
So what I did was to:
- un-sync the iCloud calendars,
- then resync them.
To unsync the iClound calendar, simply go to System Prefs, iCloud, and uncheck Calendar. Then, after rebooting, recheck it. You shouldn't loose any calendar events since they're all stored on iCloud.
That fixed it for me. Hope it works for you too!
Currently Being ModeratedJul 26, 2012 2:10 PM (in response to °Bernz°)
You may be right that the problem is iCloud related, but the weird thing is: I don't have iCloud setup! I.e. when I go to System Prefs->iCloud, I get asked to log into iCloud with my Apple Id - which I am not about to do as I am too paranoid to hand over all my private data to Apple.
An alternative explanation I've found on the web is that it might have been Spotlight re-indexing the entire system that was taking up all the CPU. I'm not entirely sure why/how that was necessary as I have everything unchecked under System Prefs->Spotlight. But who knows - maybe Apple does all the indexing anyway - in case you check something under that Pref and then it won't need to do much, other than include those categories in the retrieved results....Spotlight seems a reasonable culprit as the CPU utilization has gone down after a few hours - after I posted this, of course :-(
As of now, things are ok - CPU wise. Now if Safari wouldn't crash on me once a day, I'd be happy with Mountain Lion.
Currently Being ModeratedDec 3, 2012 10:08 AM (in response to tjwolf)
I've had similar issues, and I now believe it to be iCalExternalSync related. Will test Bernz's reset in a moment.
What I've generally noticed is that disk I/O is thorugh the roof. I can hear my internal hard drive crunching away, and the entire system is brought to a crawl. It's intermittent, and previous hunts through Activiy Monitor have been largely unsuccessful, although I'll see major spikes in the Disk Activity graph:
I too blamed spotlight and have tried resetting it to no avail. I even found a terminal command to diable it entirely, and that didn't make a difference. I just decided to attack the problem again today, once again quitting all apps one by one, then non-critical background processes, looking for the culprit. The disk churn would stop, I'd think I'd found it, then it'd come back.
So today I started pretty much randomly killing processes to see if I got lucky, and I think I did. I killed iCalExternalSync, and the churn stopped. Then the churn came back — but so did iCalExternalSync. That's when I searched and found this thread.
So here we go… going to disable Calendar iCloud sync entirely the moment. I will re-enable later, but for now let's see if getting rid of it entirely keeps the problem from returning for a few days. I can monitor my calendar from other devices for now.
Fingers crossed… if you guys have anything to add (this thread is a bit old), I'm all ears.
Oh isn't that interesting. I turned off "Calendars & Reminders" in iCloud settings, and it wiped my calendars out as expected, then turned itself back on.
Hmm still watching, it hasn't turned itself on yet but I do see iCalExternalSync pop into activity monitor occassionally. I still have one subscribed CalDAV plus the Birthdays subscription; turning those off next.
… … …
Birthdays off, iCalExternalSync still flits on but very brief and no big I/O. I suppose it's needed to read the CalDAV. Turning that off now.
… … … …
That seems to have done it. Never seen the I/O this flatlined before.
OK, posting this now… going to let things be for a while and see how it goes. Will report back.
Currently Being ModeratedDec 10, 2012 4:14 PM (in response to jlinaschke)
I have great news… I've had Calendar syncing off for a week and haven't experienced the massive I/O activity from before. Yay!!
I've just re-enabled it, so now we'll see if comes back or if just toggling it off was all that was ever needed.
Currently Being ModeratedJan 25, 2013 8:03 AM (in response to jlinaschke)
I have tried shutting down everything calendar related, including deleting calendar and cache, but this just continues to plague me. I'm becoming suspicious of notifications. Even though i have deleted all iCal calendars, and iCloud is off, and there are no apps in the notification center - I get a stream of reminders that pop up occasionally in the upper right hand corner, (some of these reminders have dozens of copies, so it takes a series of clicks to close them all). Where are they coming from if I have deleted all the calendars? There is a bug somewhere in notification center that keeps searching for cal items and multiplying ones that are stored somewhere in the library. Any advice where to look? Anyone? This is killing my MBA - it gets so hot - I'm frying the processor. Only solution so far is to watch the activity monitor and kill it when it takes off.