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Level 1

0 points

Mail Locked at 25-30% CPU Usage

Hey guys, I know there's a thousand threads out there for CPU usage in Mail but I'm not getting the 90-100% CPU usage, mine's locking in at about 25-30%.

I've tried rebuilding my mail box, deleting RSS feeds, deleting emails with large attachments, closing/re-opening Mail, taking my accounts offline, removing/re-adding com.apple.mail.plist, pretty much everything I could think of or find on the internet.

I should add that nothing's going on in Activity monitor, nothing out of the ordinary ( downloading email task which closes quickly after its done ).

The one thing that I know fixes it, is rebooting, which is pretty unacceptable.

I'm not sure what starts this up but I've noticed that if I delete a bunch of mail, it tends to happen. Regularly, mail runs at ~1-2% CPU usage.

Any ideas?

Macbook Pro early-2008, Mac OS X (10.6.2)

Posted on Feb 5, 2010 12:56 PM

24 replies

roblight

Level 1

0 points

May 5, 2010 11:07 AM in response to JeffCMKRNL

Ditto. Definitely Mail.app that's eating 20-30% of the CPU. I get an extra hour of battery if I kill Mail.app. I'm connected to an Exchange 2007 server only.

Paul133 Author

Level 1

0 points

Jun 4, 2010 1:34 PM in response to Paul133

I'm not sure if this was it, but I've deleted a lot of duplicate mails in some folders (I keep an inbox folder on my Mac since our Exchange server deletes mail older than 45 days) and have not seen this issue occur since.

For those of you who are still experiencing this issue, try deleting your duplicate mails, there's applescripts to find/delete them.

Paul133 Author

Level 1

0 points

Jun 7, 2010 1:42 PM in response to Paul133

And of course, when I say that it hasn't happened in a while, it starts happening again...grrr

Jul 20, 2010 1:45 PM in response to Paul133

Worked for me as well - Mail CPU has all but gone to zero. Thanks.

Jul 25, 2010 11:37 PM in response to Paul133

My way to solve it was by removing the Address Book plugins that Adium and others had installed under ~/Library/Address Book Plug-Ins/

I tried all previously recommended solutions and they didn't work, the problem appeared after creating an Exchange account and only went away after removing the address book plugins.

Mail.app now idles as expected while it was using ~30% cpu before this, it's been working fine for 2 weeks now.

Tim Kite

Level 1

14 points

Aug 5, 2010 8:06 AM in response to Sylvain G

Sylvain G wrote:
My way to solve it was by removing the Address Book plugins that Adium and others had installed under ~/Library/Address Book Plug-Ins/

I tried all previously recommended solutions and they didn't work, the problem appeared after creating an Exchange account and only went away after removing the address book plugins.

Mail.app now idles as expected while it was using ~30% cpu before this, it's been working fine for 2 weeks now.

That worked for me, and I was seeing the issue exactly as previously stated! I've got an Exchange 2007 account, and Adium installed, and Address Book/looking up Exchange addresses in Mail messages would hang. After removing Adium's address book plugins, all the problems went away. No reboot required. Maybe a problem between Address Book's Exchange 2007 connector and Adium's Address Book plugins?

homeovet

Level 1

15 points

Aug 22, 2010 7:44 AM in response to Tim Kite

This worked for me, too, though Skype was the culprit. Adium was there in abundance, too, and I had to restart Mail before the effect took place. Nice.

homeovet

Level 1

15 points

Aug 28, 2010 6:07 AM in response to homeovet

Not a permanent fix. Back again, and nothing in Mail Plugins. Grrrr.

mod_ebm

Level 1

4 points

Sep 6, 2010 12:18 AM in response to Paul133

Same here. Connected to an exchange server and for 2 weeks Mail.app runs wild. After some seconds Mail starts to grep 25 to 30 percent of CPU usage. Analysing the process with activity monitor shows a thread running which syncs between mail and the addressbook. Addressbook itself has problems too syncing with the exchange addressbook running at 25% too.

I have found out that after some hours of running mail consumes 1.5gb of RAM so a memory leak is there as well.

I am quire frustrated.

Mail Locked at 25-30% CPU Usage