6 Replies Latest reply: Jul 11, 2013 4:21 PM by surjit
surjit Level 2 Level 2

I have a 13" MBP with Retina display, running 10.8.4. Several times a day, the CPU usage spontaneously spikes to 100-200% and the fans go nuts. I've been trying to pin it to an activity, but I don't usually notice it until the sound of the jets taking off fans spinning up alerts me and Mail is often in the background. So I can't tie it to anything yet.


I'm running 5 Gmail/Google Apps email accounts. Even though CPU usages spikes badly, Mail doesn't seen to become less usable - the main bummer is the fans spinning up which can be quite distracting in meetings or on Skype calls. After a few minutes, Mail calms down and things go back to normal, or I can kill/restart Mail.


Here's what the resources look like when this happens:


Screen Shot 2013-06-17 at 6.06.55 PM.png

I am running the current version of InDev's Mail Act-On but I uninstalled it and it made no difference - still the same spikes several times a day. No other add-ons in Mail. I've tried resetting the SyncServices folder based on some other posts here.


Any tips on how to resolve this?

MacBook Pro with Retina display, OS X Mountain Lion (10.8.4)
Reply by St. Clair Software on Jul 9, 2013 5:33 PM Helpful

In Mail's Window menu, open up the Activity window. The next time the CPU usage spikes, see what Mail is doing. I've noticed it sucking up lots of processor time once in a while and the activity window says something about it synchronizing with my Gmail account, but haven't looked closer to see exactly what it's doing.

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