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800% CPU Usage used by Mail App?

Hi,

since i've upgraded to Lion my Mail App goes hurry up to 800% CPU Usage and more. My 2011 MacBook Pro goes very loud and hot. So after a few tips i've reinstalled complety the Lion (with a self made Lion CD) and reconfigured Mail (without any backup import). But nothing happens. I cannot leave Mail open a few minutes because it starts normally but then goes up to 100%, 200%,... new record yesterday was 800% of CPU Usage.

I have about 10 Mail IMAP Accounts with round about 6000 Mails. A friend as more than this and doesn't have such problems on his new iMac.

I'm very frustrated and don't know what should i do... at this point i cannot use the mail app.

Hope you could help me please!

Best,

Henny

MacBook Pro, Mac OS X (10.7)

Posted on Jul 21, 2011 11:35 PM

Best reply

Henny23 Author

Level 1

0 points

Posted on Jul 22, 2011 7:20 AM

i think i've got the solution for my problem with the mega high cpu usage on mail app...

Open the Disk-Management-Utility
Select your Mac OS Disk
Repair the access rights and wait.

After reopen the mail app (maybe you must restart too), the mail app works fine it seems for now and the cpu ussage is about 8% at the moment. i hope that was the solution.

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18 replies

andyface

Level 1

4 points

Mar 16, 2012 6:26 AM in response to Henny23

I was having an issue with mail using between 80-170% of my CPU, having reset the permissions and restarted everything is back running how it should.

Thanks for the info.

Dec 26, 2013 4:13 AM in response to Henny23

I had similar problem after an update. It went away after I removed several Sfarri plugons and startup items. I cannot pinpoint the sole responsible, as all actions were executed in one batch (I suspect either the spelling library or internet plugins - as the Mail App kept running threads called "web content").

List of actions done (replace xxx with username), Mail and Safari must be stopped:

Removed inactive and unreachable email account (deactivated the account).

Deleted Envelope files from:

/Users/xxx/Library/Mail/V2/MailData/

(see other threads for instructions)

Removed old 3^rd party spelling library from:

/Library/Spelling/

/Users/xxx/Library/Spelling/

Removed unused, old or unwanted Safari plug-ins:

/Library/Internet Plug-Ins/

/Users/xxx/Library/Internet Plug-Ins/

AdobePDFViewer.plugin
AdobePDFViewerNPAPI.plugin
Flip4Mac WMV Plugin.plugin
iPhotoPhotocast.plugin
SharePointBrowserPlugin.plugin
SharePointWebKitPlugin.webplugin
Unity Web Player.plugin

Removed unused or unwanted startup items from:/Users/xxx/Library/LaunchAgents//Library/LaunchAgents//Library/LaunchDaemo ns/

com.adobe.AAM.Updater-1.0.plist
com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109.plist
com.adobe.fpsaud.plist
com.adobe.SwitchBoard.plist
com.bombich.ccc.plist
com.google.keystone.agent.plist
com.google.keystone.daemon.plist
it.infn.lnf.network.AFSBackgrounder.plist
org.ocsng.agent.plist

Viola, after a full restart and rebuild of Envelope files, Mail App is docile keeping its paws off my CPU when nothing is asked of it.

May 21, 2014 1:57 AM in response to sunt05

The ArsTechnica solution solved it for me. Thanks!

800% CPU Usage used by Mail App?