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Question: Mail locks up all of a sudden (high RAM)

About a week or so ago one of my company computers started locking up when opening mail. RAM usage skyrockets and everything locks up. I tried to move the pertinent folders/files and got mail to open from scratch again but upon adding in the account again, same issue.

imac 21" mid 2011


Much thanks for the help.

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Nov 19, 2017 1:08 PM in response to Rippeddisc In response to Rippeddisc


Did fresh format and reinstall. Ran diag with no failed reports.

RAM usage shoots up to 6-10gb (4gb machine). Takes a looonnnng time for Mail to load. Like overnight (tested).


Nov 19, 2017 1:08 PM

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Nov 24, 2017 9:59 PM in response to rkaufmann87 In response to rkaufmann87

I have to keep Mail closed b/c once open it just ***** RAM. Started about a week ago or so on this machine. No idea why. Here's the report;

EtreCheck version: 3.4.6 (460)

Report generated 2017-11-24 19:57:17

Download EtreCheck from https://etrecheck.com

Runtime: 6:56

Performance: Below Average

Click the [Lookup] links for more information from Apple Support Communities.

Click the [Details] links for more information about that line.

Click the [Clean up] link to delete unused files.

Problem: Computer is too slow


High RAM usage with mail. Locks up computer.

Hardware Information: ⓘ

iMac (21.5-inch, Mid 2011)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac12,1

1 2.5 GHz Intel Core i5 (i5-2400S) CPU: 4-core

4 GB RAM Upgradeable - [Instructions]


2 GB DDR3 1333 MHz ok


2 GB DDR3 1333 MHz ok





Handoff/Airdrop2: not supported

Wireless: en1: 802.11 a/b/g/n

iCloud Quota: 1.14 GB available

iCloud Status: 245 pending files

Video Information: ⓘ

AMD Radeon HD 6750M - VRAM: 512 MB

iMac 1920 x 1080

Disk Information: ⓘ

ST3500418AS disk0: (500.11 GB) (Rotational)

[Show SMART report]

EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB

Macintosh HD (disk0s2 - Journaled HFS+) / [Startup]: 499.25 GB (341.09 GB free)

Recovery HD (disk0s3 - Journaled HFS+) <not mounted> [Recovery]: 650 MB


USB Information: ⓘ


Apple Inc. FaceTime HD Camera (Built-in)


Seagate Ultra Slim MT

Ultra Slim MT disk1: (2 TB)

EFI (disk1s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB

Poipu Time Machine (disk1s2 - Journaled HFS+) /Volumes/Poipu Time Machine : 2.00 TB (1.40 TB free)

Apple Inc. BRCM2046 Hub

Apple Inc. Bluetooth USB Host Controller



Apple Computer, Inc. IR Receiver

Apple Card Reader

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

System Software: ⓘ

macOS Sierra 10.12.6 (16G1036) - Time since boot: about 2 days

Configuration files: ⓘ

/etc/hosts - Count: 14

Gatekeeper: ⓘ

Mac App Store and identified developers

Clean up: ⓘ


/Library/Application Support/Adobe/CS5ServiceManager/CS5ServiceManager.app/Contents/MacOS/CS5Service Manager -launchedbylogin

Executable not found!


/Library/Application Support/Carbonite/CarboniteAlerts.app/Contents/MacOS/CarboniteAlerts

Executable not found!


/Library/Application Support/Carbonite/CarboniteStatus.app/Contents/MacOS/CarboniteStatus

Executable not found!


/Library/Application Support/LogMeIn/bin/LMILaunchAgentFixer.app/Contents/MacOS/LMILaunchAgentFixer fromlaunchagent

Executable not found!


/Library/PreferencePanes/TechTool Protection.prefPane/Contents/PlugIns/TechToolProAgent.app/Contents/MacOS/TechTo olProAgent

Executable not found!


/usr/sbin/xtendsan/iscsid -d -J-Djava.security.policy=/usr/sbin/xtendsan/iscsid.sec -J-Dcom.attotech.iscsid.discovery.verbose=true --J-Dcom.attotech.iscsid.logLevel=VERBOSE --J-Dcom.attotech.iscsid.discovery.MaxRecvDataSegmentLength=512 --J-Dcom.attotech.iscsid.discovery.AllowPaddedDSL=true

Executable not found!


/Library/Application Support/LogMeIn/update/raupdate /s

Executable not found!


/Library/PreferencePanes/TechTool Protection.prefPane/Contents/PlugIns/TechToolProDaemon.app/Contents/MacOS/TechT oolProDaemon

Executable not found!


/System/Library/Extensions/SierraSwitch.kext/Contents/Resources/SierraSWoCDaemo n

Executable not found!



Executable not found!



Executable not found!

11 orphan files found. [Clean up]

Kernel Extensions: ⓘ

/Library/Application Support/LogMeIn/drivers

[not loaded] com.logmein.driver.LogMeInSoundDriver (4.1.8517) [Lookup]

/Library/Application Support/VMware Fusion/kexts

[not loaded] com.vmware.kext.vmci (3.0.0) [Lookup]

[not loaded] com.vmware.kext.vmioplug (3.0.0) [Lookup]

[not loaded] com.vmware.kext.vmnet (3.0.0) [Lookup]

[not loaded] com.vmware.kext.vmx86 (3.0.0) [Lookup]


[not loaded] com.TrustedData.driver.VendorSpecificType00 (1.4.0) [Lookup]

[not loaded] com.attotech.driver.ATTOiSCSI (3.4.1b1 - SDK 10.6) [Lookup]

[not loaded] com.novatelwireless.driver.3G (v2.2.8 (3)) [Lookup]

[not loaded] com.novatelwireless.driver.DisableAutoInstall (1.2) [Lookup]

[not loaded] com.sierrawireless.driver.SierraDevSupport ( [Lookup]

[not loaded] com.sierrawireless.driver.SierraFSCSupport ( [Lookup]

[not loaded] com.sierrawireless.driver.SierraFSRSupport ( [Lookup]

[not loaded] com.sierrawireless.driver.SierraHSRSupport ( [Lookup]


[not loaded] com.novatelwireless.driver.3GData (v2.2.8 (3)) [Lookup]

Startup Items: ⓘ

ProTec6: Path: /Library/StartupItems/ProTec6

ProTec6b: Path: /Library/StartupItems/ProTec6b

Qmaster: Path: /Library/StartupItems/Qmaster

Startup items no longer function in OS X Yosemite or later

System Launch Agents: ⓘ

[not loaded] 8 Apple tasks

[loaded] 173 Apple tasks

[running] 72 Apple tasks

[killed] 32 Apple tasks

32 processes killed due to insufficient RAM

System Launch Daemons: ⓘ

[failed] com.apple.smbd.plist (Apple, Inc. - installed 2017-07-14)

[not loaded] 39 Apple tasks

[loaded] 168 Apple tasks

[running] 86 Apple tasks

[killed] 23 Apple tasks

23 processes killed due to insufficient RAM

Launch Agents: ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (? ffb65062 17b9373f - installed 2011-12-08) [Lookup]

[failed] com.adobe.CS5ServiceManager.plist (? 40cdc1ff 0 - installed 2011-12-09) [Lookup] - /Library/Application Support/Adobe/CS5ServiceManager/CS5ServiceManager.app/Contents/MacOS/CS5Service Manager: Executable not found!

[loaded] com.carbonite.launchd.carbonitealerts.plist (? 21f61fa7 0 - installed 2010-01-24) [Lookup] - /Library/Application Support/Carbonite/CarboniteAlerts.app/Contents/MacOS/CarboniteAlerts: Executable not found!

[failed] com.carbonite.launchd.carbonitestatus.plist (? bb5f817b 0 - installed 2010-01-24) [Lookup] - /Library/Application Support/Carbonite/CarboniteStatus.app/Contents/MacOS/CarboniteStatus: Executable not found!

[failed] com.google.keystone.agent.plist (Google, Inc. - installed 2017-09-27) [Lookup]

[loaded] com.lexmark.lxknetlaunchd.plist (? 8a3157c5 0 - installed 2011-05-09) [Lookup]

[failed] com.logmein.LMILaunchAgentFixer.plist (? 2c91a132 0 - installed 2017-09-29) [Lookup] - /Library/Application Support/LogMeIn/bin/LMILaunchAgentFixer.app/Contents/MacOS/LMILaunchAgentFixer: Executable not found!

[running] com.logmein.logmeingui.plist (LogMeIn, Inc. - installed 2017-09-29) [Lookup]

[running] com.logmein.logmeinguiagent.plist (LogMeIn, Inc. - installed 2017-09-29) [Lookup]

[not loaded] com.logmein.logmeinguiagentatlogin.plist (LogMeIn, Inc. - installed 2017-09-29) [Lookup]

[failed] com.micromat.TechToolProAgent.plist (? d1b210f3 0 - installed 2010-05-20) [Lookup] - /Library/PreferencePanes/TechTool Protection.prefPane/Contents/PlugIns/TechToolProAgent.app/Contents/MacOS/TechTo olProAgent: Executable not found!

Launch Daemons: ⓘ

[loaded] com.adobe.SwitchBoard.plist (? 68cad67 0 - installed 2011-12-09) [Lookup]

[loaded] com.adobe.fpsaud.plist (? 2afb3af7 defea098 - installed 2017-10-25) [Lookup]

[not loaded] com.attotech.iscsid.plist (? ab5afb27 0 - installed 2011-12-17) [Lookup] - /usr/sbin/xtendsan/iscsid: Executable not found!

[running] com.datarobotics.ddservice64d.plist (? 732008ea 383d0cc4 - installed 2011-11-04) [Lookup]

[running] com.datarobotics.ddserviced.plist (? 5ae83f29 474727c5 - installed 2011-11-04) [Lookup]

[loaded] com.google.keystone.daemon.plist (Google, Inc. - installed 2017-10-12) [Lookup]

[running] com.logmein.logmeinserver.plist (? f1a7c613 ebb261c4 - installed 2017-09-29) [Lookup]

[loaded] com.logmein.raupdate.plist (? 1264939f 0 - installed 2013-05-31) [Lookup] - /Library/Application Support/LogMeIn/update/raupdate: Executable not found!

[failed] com.micromat.TechToolProDaemon.plist (? fc34c578 0 - installed 2010-05-20) [Lookup] - /Library/PreferencePanes/TechTool Protection.prefPane/Contents/PlugIns/TechToolProDaemon.app/Contents/MacOS/TechT oolProDaemon: Executable not found!

[running] com.sierrawireless.SWoCMon.plist (? e9f627d7 ffad7bd1 - installed 2009-08-21) [Lookup]

[failed] com.sierrawireless.SWoCTool.plist (? 3463e1f7 0 - installed 2008-07-15) [Lookup] - /System/Library/Extensions/SierraSwitch.kext/Contents/Resources/SierraSWoCDaemo n: Executable not found!

[not loaded] com.sierrawireless.SierraReset.plist (? c3d62c61 0 - installed 2009-08-21) [Lookup] - /Library/Sierra/SierraReset: Executable not found!

[loaded] com.sonos.smbbump.plist (? 25deed1f 7545b4fd - installed 2014-04-12) [Lookup]

[failed] com.starfield.backupservice.plist (? e9a26e0a 0 - installed 2011-09-30) [Lookup] - /Applications/Workspace/BackupService/offSyncService: Executable not found!

[failed] com.vmware.launchd.vmware.plist (Shell Script 40d1be26 - installed 2009-12-07) [Lookup]

User Launch Agents: ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist (? 6a3cceca 17b9373f - installed 2012-03-16) [Lookup]

[loaded] com.dropbox.DropboxMacUpdate.agent.plist (Dropbox, Inc. - installed 2017-08-11) [Lookup]

User Login Items: ⓘ

Dropbox Application


Internet Plug-ins: ⓘ

DirectorShockwave: 11.0.3r472 (installed 2011-03-30) [Lookup]

o1dbrowserplugin: (installed 2015-12-16) [Lookup]

Google Earth Web Plug-in: 6.0 (installed 2011-05-16) [Lookup]

OfficeLiveBrowserPlugin: 12.3.2 (installed 2012-01-02) [Lookup]

Flip4Mac WMV Plugin: (installed 2011-01-13) [Lookup]

Silverlight: 5.1.10411.0 (installed 2012-10-23) [Lookup]

FlashPlayer-10.6: (installed 2017-11-14) [Lookup]

DivXBrowserPlugin: 2.0 (installed 2011-03-30) [Lookup]

LogMeIn: 1.0.935 (installed 2013-03-12) [Lookup]

QuickTime Plugin: 7.7.3 (installed 2017-11-19)

Flash Player: (installed 2017-11-14) [Lookup]

googletalkbrowserplugin: (installed 2015-12-11) [Lookup]

iPhotoPhotocast: 7.0 (installed 2011-10-31)

AdobePDFViewer: 9.5.0 (installed 2012-01-13) [Lookup]

LogMeInSafari32: 1.0.935 (installed 2013-03-12) [Lookup]

Yahoo! Installer 3: 1.0.128 (installed 2011-03-30) [Lookup]

JavaAppletPlugin: 15.0.1 (installed 2012-01-20) Check version

Audio Plug-ins: ⓘ

DVCPROHDAudio: 1.3 (installed 2011-03-30)

3rd Party Preference Panes: ⓘ

DivX (installed 2011-03-30) [Lookup]

Flash Player (installed 2017-10-25) [Lookup]

Flip4Mac WMV (installed 2011-01-13) [Lookup]

Time Machine: ⓘ

Skip System Files: NO

Mobile backups: OFF

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 499.25 GB Disk used: 158.15 GB


Poipu Time Machine [Local]

Total size: 2.00 TB

Total number of backups: 88

Oldest backup: 11/2/16, 3:46 PM

Last backup: 11/24/17, 7:06 PM

Size of backup disk: Excellent

Backup size 2.00 TB > (Disk size 499.25 GB X 3)

Top Processes by CPU: ⓘ

4% firefox

2% WindowServer

1% com.apple.WebKit.WebContent

1% kernel_task

0% Dock

Top Processes by Memory: ⓘ

783 MB firefox

596 MB kernel_task

74 MB com.apple.preferences.icloud.remoteservice

59 MB com.apple.WebKit.WebContent

39 MB mds_stores

Top Processes by Network Use: ⓘ

Input Output Process name

29 MB 337 KB Dropbox

7 MB 526 KB Dropbox

2 MB 216 KB firefox

2 MB 408 KB mDNSResponder

94 KB 61 KB netbiosd

Top Processes by Energy Use: ⓘ

14.78 firefox

8.90 LogMeIn

5.42 WindowServer

1.90 DDService64d

Virtual Memory Information: ⓘ

526 MB Available RAM

18 MB Free RAM

3.49 GB Used RAM

507 MB Cached files

401 MB Swap Used

Diagnostics Events (last 3 days for minor events): ⓘ

2017-11-23 14:28:45 Safari.app High CPU use [Open] [Details]

2017-11-22 16:52:11 coreaudiod Crash [Open]

Cause: abort() called

terminating with uncaught exception of type CAException

2017-11-22 16:51:22 Last shutdown cause: 3 - Hard shutdown

Nov 24, 2017 9:59 PM

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Nov 24, 2017 10:25 PM in response to Rippeddisc In response to Rippeddisc

First upgrade the RAM to 16GB using either Crucial (buy it direct) or OWC (www.macsales.com) RAM. Then get rid of the orphan files and clean up the Internet Plugins and keep your third party apps up to date and uninstall the Tech Tools app which is worthless.

Nov 24, 2017 10:25 PM

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Nov 24, 2017 10:29 PM in response to rkaufmann87 In response to rkaufmann87

This computer is only used for email and web browsing. And has been working fine, without problem for years. There is no need for 16gb of RAM on this machine.

Of all the things you suggest none explain why Mail's RAM usage is through the roof.

I'm using my person mbp which has WAY more going on and Mail only takes up 630mb RAM.

Nov 24, 2017 10:29 PM

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Nov 25, 2017 8:14 AM in response to Rippeddisc In response to Rippeddisc

Look at the report, It will indicate it is starved for RAM. If you only use it for mail and web browsing then do an erase and install and start over. You have so much useless stuff on it then it's easier if you simply start over.

Nov 25, 2017 8:14 AM

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Nov 25, 2017 9:49 AM in response to Rippeddisc In response to Rippeddisc

Dear Rippeddisc,

First I agree with my esteemed colleague rkaufmann that you have way too much third-party stuff. Some of it is badly outdated, too. Some dates are older than the computer suggesting they were migrated from an even older Mac long ago. There is evidence that badly outdated versions of DivX can hurt performance--yours is six years old. If you really need it, update it. Otherwise, show it the door. Flip4 Mac is also ancient in computer years.

Adding RAM is always good but, unlike my colleague, I believe that your "insufficent" RAM warnings are about 90 percent due to all the third-party dreck, old or not. Your Virtual Memory "swaps" are up but IMHO commensurate with the dreckware load and time since restart. My son has a similar yet slightly less-capable Mac than yours that has run every OS from the original 10.8 through 10.12 on only 4GB RAM without issue for five years. The difference is that his computer is not burdened with steaming piles of third-party uselessness.

I feel reasonably sure that adding RAM now without eliminating the software bloat may not gain you much improvement. However, given the usage you describe, 8GB RAM is an affordable and useful investment in prolonging the computer's service life, especially if you must use a browser to check emails 9as opposed to a mail client like Apple mail or Outlook). Browsers are no longer low-impact apps.

In addition to off-loading a lot of old and unneeded software, were this computer mine I would also be looking at these:

1) This is not a normal part of a report:

iCloud Status: 245 pending files

Something is stopping iCloud backups. Could cause an issue.

2) This is a potential problem:

Configuration files: ⓘ

/etc/hosts - Count: 14

Please see this excellent User Tip written by Etrecheck's developer for explanation and help in recovering from this:

Fixing a hacked /etc/hosts file

3) Carbonite is on my suspect list. It has caused slowness issues with Mac OS for quite a while. Please see this discussion topic:

Carbonite CPU Usage

It is my experience that, excepting DropBox and maybe iCloud when it's working properly, third-party online backup schemes can hurt performance. The slower the internet connection the more noticeable the issue. I use DropBox only, saving iCloud for synching contacts, calendar events, etc. between my computers and iPads.

4) Just for the heck of it, eject and disconnect the external drive for testing. Some older enclosures can create stalls. The main reason I switched all our external backup drives to OWC Mercury Elite enclosures is that some of the "name-brand" drives, even those offered as "Mac-friendly," were causing frequent system stalls and overheating of both the computer and the drive itself. If there is no difference with the drive detached, at least you have eliminated one variable

Nov 25, 2017 9:49 AM

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Nov 25, 2017 3:58 PM in response to Allan Jones In response to Allan Jones

Thank guys for the help. I appreciate the time.

I have gone through and got rid of a lot of the unused stuff.

However, this does not explain why the computer had been working without an issue and then about 10 days ago Mail started using crazy amounts of RAM. There's no reason Mail should spike to use 2gb+ RAM. Even if the computer is under-powered it had been working without problem.

Nov 25, 2017 3:58 PM

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User profile for user: Rippeddisc

Question: Mail locks up all of a sudden (high RAM)