El Capitan OS X 10.11.6 (15G31) - Mail High CPU

Question

Since upgrading to El Capitan OS X 10.11.6 (15G31), Mail is consuming high CPU cycles typically 180-200% CPU on Octo-core Mac Pro 5.1 workstation 😠😠 (consequently have had to turn fans up ~ smcFanControl, as everything was getting really HOT). Appears to be same/similar issue to what was experienced previously with El Capitan OS X 10.11, I know this issue was fixed patched at El Capitan OS X 10.11.1 (appears now broken). I am not running Avast Antivirus (known previous incompatibility). Any and all constructive help/suggestions to overcome issue from the support forum welcome (prior to having to file ticket with Apple). Thanks Inquisitor 😀

currenstatus · Answer

Has anyone noticed Mail only starts overheating the CPU&#x27;s with certain types of mail. If I open Mail and do/select nothing, it&#x27;s fine. But if I highlight a mail which has a new contact info.. large attachments or possibly the newest mail in my list.. my CPU goes through the roof!  I think this is a Mail coding issue !!Anyone else home in on this..

Csound1 · Answer

Install the combo updateDownload OS X El Capitan 10.11.6 Combo Update

Inquisitor-LSL · Answer

Csound1, yes have done this, no change. Regards Inquisitor

Lexiepex · Answer

Your problem is not with Mail, but by syncing issues caused by AvastAntivirus.Uninstall Avast completely, even an ElCapitan compatible Avast is causing many and serious issues. It is really counterproductive in adding security.Lex

Csound1 · Answer

Run a report with Etrecheck and post the results here

Inquisitor-LSL · Answer

Csound1, here goes Etrecheck report:EtreCheck version: 2.9.13 (267)Report generated 2016-07-20 17:48:13Download EtreCheck from https://etrecheck.comRuntime 1:47Performance: ExcellentClick the [Support] links for help with non-Apple products.Click the [Details] links for more information about that line.Check Apple signatures: EnabledHide Apple tasks: DisabledProblem: Other problemDescription:El Capitan 10.11.6 (15G31) - Mail High CPUHardware Information:ⓘ    Mac Pro (Mid 2010)     [Technical Specifications] - [User Guide] - [Warranty &amp; Service]    Mac Pro - model: MacPro5,1    2 2.4 GHz Quad-Core Intel Xeon CPU: 8-core    16 GB RAM Upgradeable - [Instructions]        DIMM 1            2 GB DDR3 ECC 1066 MHz ok        DIMM 2            2 GB DDR3 ECC 1066 MHz ok        DIMM 3            2 GB DDR3 ECC 1066 MHz ok        DIMM 4            2 GB DDR3 ECC 1066 MHz ok        DIMM 5            2 GB DDR3 ECC 1066 MHz ok        DIMM 6            2 GB DDR3 ECC 1066 MHz ok        DIMM 7            2 GB DDR3 ECC 1066 MHz ok        DIMM 8            2 GB DDR3 ECC 1066 MHz ok    Bluetooth: Old - Handoff/Airdrop2 not supported    Wireless:  en2: 802.11 a/b/g/nVideo Information:ⓘ    ATI Radeon HD 5770 - VRAM: 1024 MB        E2350 1920 x 1080 @ 60 Hz        IPS236        1920 x 1080 @ 60 HzSystem Software:ⓘ    OS X El Capitan 10.11.6 (15G31) - Time since boot: less than an hourDisk Information:ⓘ    HL-DT-ST DVD-RW GH61N   ()    OCZ-AGILITY3 disk0 : (240.06 GB) (Solid State - TRIM: Yes)        EFI (disk0s1) &lt;not mounted&gt; : 210 MB         SSD (disk0s2) / : 239.20 GB (165.69 GB free)        Recovery HD (disk0s3) &lt;not mounted&gt;  [Recovery]: 650 MB     WDC WD1003FBYZ-010FB0 disk3 : (1 TB) (Rotational)        EFI (disk3s1) &lt;not mounted&gt; : 210 MB         disk3s2 (disk3s2) &lt;not mounted&gt; : 499.93 GB         disk3s3 (disk3s3) &lt;not mounted&gt; : 134 MB         disk3s4 (disk3s4) &lt;not mounted&gt; : 499.80 GB         Boot OS X (disk3s5) &lt;not mounted&gt; : 134 MB     WDC WD1003FBYZ-010FB0 disk1 : (1 TB) (Rotational)        EFI (disk1s1) &lt;not mounted&gt; : 210 MB         disk1s2 (disk1s2) &lt;not mounted&gt; : 499.93 GB         disk1s3 (disk1s3) &lt;not mounted&gt; : 134 MB         disk1s4 (disk1s4) &lt;not mounted&gt; : 499.80 GB         Boot OS X (disk1s5) &lt;not mounted&gt; : 134 MB     WDC WD5000AAKS-00TMA0 disk2 : (500.11 GB) (Rotational)        EFI (disk2s1) &lt;not mounted&gt; : 210 MB         AV &amp; VMs (disk2s2) /Volumes/AV &amp; VMs : 499.76 GB (107.52 GB free)    Hitachi HDS722020ALA330 disk4 : (2 TB) (Rotational)        EFI (disk4s1) &lt;not mounted&gt; : 210 MB         El Capitan TM (disk4s2) /Volumes/El Capitan TM : 2.00 TB (52.79 GB free)USB Information:ⓘ    Apple Inc. 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Inquisitor-LSL · Answer

Lexiepex, thanks for your response, can I confirm that I am NOT running Avast Antivirus. Regards Inquisitor

Lexiepex · Answer

I made a mistake: Avast not used.Instead I see that you are running Trusteer: also a crap app, that is counterproductive.Uninstall it.Then restart and do a Spotlight re-index:Rebuild the Spotlight index on your Mac - Apple SupportLex

Csound1 · Answer

Congratulations. You get the prize for the most background tasks I have ever seen one one Mac, it will take some time to go through that lot but start by removing Trusteer, it is junk.And what email provider are you using?

Lexiepex · Answer

Hi C,he set etrecheck list to display all those things, normally when you do not set it specifically, it only gives the number and the non-apple tasks.good timing of posts, they cross constantly here 😁

Csound1 · Answer

I know, but that does not change the fact that they are all on his Mac, and many (by the look of things) are not correct (missing files or signatures) It also seems as if Spotlight is indexing currently which would not cause the issue with mail but does confuse things as far as reporting goes

Lexiepex · Answer

correct. Mail and Spotlight use up a large chunk of the resources of the CPU.

Csound1 · Answer

Can you try a Safe Boot please.

Inquisitor-LSL · Answer

Own hosted email server (imap), Mail was perfectly fine when 10.11.5, before 10.11.6 upgrade.

Inquisitor-LSL · Answer

Have restarted, Shift key depressed for Safe Boot, saw Apple symbol now stuck on grey screen with mouse cursor. I&#x27;ll give it a minute then hard reboot.