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iMac performance is slowing

My iMac performance has been intermittently poor, but in general is steadily decreasing.  I get the spinning beachball when trying to open individual emails, or move from app to app.  Time to open apps like iTunes is longer than on other systems.  Documents in Word are sometimes slow to open, and page scrolls lag.  I don't have a correlation between when the system performs worse than others.  I ran EtreCheck, and got the following results.  Appreciate any suggestions...

EtreCheck version: 3.4.4 (448)

Report generated 2017-09-01 10:08:45

Download EtreCheck from https://etrecheck.com

Runtime: 4:53

Performance: Good

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

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

Problem: Beachballing

Description:

Computer is slow to open applications, and will often “beachball” when opening email, moving from app to app, etc

Hardware Information: ⓘ

    iMac (27-inch, Mid 2011)

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

    iMac - model: iMac12,2

    1 3.4 GHz Intel Core i7 (i7-2600) CPU: 4-core

    8 GB RAM Upgradeable - [Instructions]

        BANK 0/DIMM0

            4 GB DDR3 1333 MHz ok

        BANK 1/DIMM0

            4 GB DDR3 1333 MHz ok

        BANK 0/DIMM1

            Empty  

        BANK 1/DIMM1

            Empty  

    Handoff/Airdrop2: not supported

    Wireless:  en1: 802.11 a/b/g/n

Video Information: ⓘ

    AMD Radeon HD 6970M - VRAM: 1024 MB

        iMac 2560 x 1440

Disk Information: ⓘ

    ST31000528AS disk0: (1 TB) (Rotational)

    [Show SMART report]

        (disk0s1) <not mounted>  [EFI]: 210 MB

        Macintosh HD (disk0s2 - Journaled HFS+) /  [Startup]: 999.35 GB (713.51 GB free)

        (disk0s3) <not mounted>  [Recovery]: 650 MB

    HL-DT-STDVDRW  GA32N  ()

USB Information: ⓘ

     USB20Bus 3 TB

        Apple Inc. FaceTime HD Camera (Built-in)

         hub_device 3 TB

            Western Digital My Book 1234 3 TB

            Apple Inc. BRCM2046 Hub

                Apple Inc. Bluetooth USB Host Controller

     USB20Bus 4 TB

         hub_device 4 TB

            Western Digital My Book 1230 4 TB

            Apple Computer, Inc. IR Receiver

            Apple Card Reader

Firewire Information: ⓘ

    WD My Book 1112 800mbit - 800mbit max

        (disk2s1) <not mounted>  [partition_map]: 32 KB

        Media Storage (disk2s3 - Journaled HFS+) /Volumes/Media Storage : 2.00 TB (150.43 GB free)

        (disk1s0) <not mounted>  [partition_scheme]: 700 MB

        (disk1s0s1) <not mounted>  [partition_map]: 32 KB

        WD SmartWare (disk1s0s2 - HFS+) /Volumes/WD SmartWare : 274 MB (0 B free)

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

Virtual disks: ⓘ

    My Book for Mac (disk3s2 - Journaled HFS+) /Volumes/My Book for Mac : 3.00 TB (653.60 GB free)

        Physical disk: My Book 1234 3.00 TB (653.60 GB free)

    TIME CAP (disk4s2 - Journaled HFS+) /Volumes/TIME CAP : 4.00 TB (526.58 GB free)

        Physical disk: My Book 1230 4.00 TB (526.58 GB free)

System Software: ⓘ

    OS X El Capitan 10.11.6 (15G1510) - Time since boot: about 10 days

Gatekeeper: ⓘ

    Mac App Store and identified developers

Kernel Extensions: ⓘ

        /Library/Application Support/WDSmartWare

    [not loaded]    com.wdc.driver.1394HP (1.0.7) [Lookup]

    [not loaded]    com.wdc.driver.USBHP (1.0.5) [Lookup]

        /System/Library/Extensions

    [not loaded]    com.Apogee.driver.DuetFWOverideDriver (1.3.6) [Lookup]

    [not loaded]    com.Belcarra.iokit.USBLAN_netpart (3.1.1 - SDK 10.6) [Lookup]

    [not loaded]    com.Belcarra.iokit.USBLAN_usbpart (3.1.1 - SDK 10.6) [Lookup]

    [not loaded]    com.Logitech.Control Center.HID Driver (2.6.0) [Lookup]

    [not loaded]    com.MCCI.SLAB_USBtoUART (V1.02.2) [Lookup]

    [not loaded]    com.RemoteControl.USBLAN.usbpart (3.1.1 - SDK 10.7) [Lookup]

    [not loaded]    com.rim.driver.BlackBerryUSBDriverInt (0.0.52) [Lookup]

    [not loaded]    com.rim.driver.BlackBerryUSBDriverVSP (0.0.45) [Lookup]

        /System/Library/Extensions/2.2.0/Belcarra.USBLAN_netpart.kext/Contents/Plug-Ins

    [not loaded]    com.belcarra.iokit.netpart.panther (1.6.3) [Lookup]

        /System/Library/Extensions/2.2.0/Belcarra.USBLAN_usbpart.kext/Contents/Plug-Ins

    [not loaded]    com.belcarra.iokit.usbpart.panther (1.6.3) [Lookup]

        /System/Library/Extensions/2.2.0/RemoteControl.USBLAN_usbpart.kext/Contents/Plu g-Ins

    [not loaded]    com.RemoteControl.USBLAN.panther (1.6.2) [Lookup]

System Launch Agents: ⓘ

    [not loaded]    8 Apple tasks

    [loaded]    149 Apple tasks

    [running]    82 Apple tasks

System Launch Daemons: ⓘ

    [not loaded]    46 Apple tasks

    [loaded]    147 Apple tasks

    [running]    98 Apple tasks

Launch Agents: ⓘ

    [failed]    com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a 23d420d.plist (Adobe Systems, Inc. - installed 2017-01-12) [Lookup]

    [running]    com.mcafee.menulet.plist (McAfee, Inc. - installed 2016-11-16) [Lookup]

    [running]    com.mcafee.reporter.plist (McAfee, Inc. - installed 2016-11-16) [Lookup]

    [running]    com.rim.BBLaunchAgent.plist (? dcf2726d 1ba65d6d - installed 2011-02-09) [Lookup]

    [failed]    com.trusteer.rapport.rapportd.plist (? 7d87a10d 91e17d - installed 2010-06-28) [Lookup]

Launch Daemons: ⓘ

    [loaded]    com.adobe.ARMDC.Communicator.plist (Adobe Systems, Inc. - installed 2017-01-12) [Lookup]

    [loaded]    com.adobe.ARMDC.SMJobBlessHelper.plist (Adobe Systems, Inc. - installed 2017-01-12) [Lookup]

    [loaded]    com.adobe.fpsaud.plist (? 2afb3af7 85012398 - installed 2017-07-24) [Lookup]

    [loaded]    com.cardscan.cardscan.plist (? 9c6909e6 89230b15 - installed 2014-12-19) [Lookup]

    [running]    com.duetDaemon.plist (? 5ff4536f 8fb429cb - installed 2007-10-26) [Lookup]

    [running]    com.fitbit.fitbitd.plist (? 969bfef5 84992452 - installed 2011-07-26) [Lookup]

    [running]    com.fitbit.galileod.plist (Fitbit, Inc. - installed 2014-10-29) [Lookup]

    [running]    com.mcafee.cspd.plist (McAfee, Inc. - installed 2016-03-15) [Lookup]

    [not loaded]    com.mcafee.ssm.ScanFactory.plist (? 0 ? - installed 2016-07-26) [Lookup]

    [not loaded]    com.mcafee.ssm.ScanManager.plist (? 0 ? - installed 2016-07-26) [Lookup]

    [running]    com.mcafee.virusscan.fmpd.plist (McAfee, Inc. - installed 2016-03-29) [Lookup]

    [running]    com.microsoft.autoupdate.helper.plist (Microsoft Corporation - installed 2017-08-18) [Lookup]

    [running]    com.rim.BBDaemon.plist (? 9f895e8a 3efb3e78 - installed 2010-12-17) [Lookup]

    [running]    com.trusteer.rooks.rooksd.plist (? 861b4fc7 2f3c9514 - installed 2010-06-28) [Lookup]

User Launch Agents: ⓘ

    [loaded]    com.apple.SafariBookmarksSyncer.plist (? ? ? - installed 2011-02-21)

    [loaded]    com.google.keystone.agent.plist (Google, Inc. - installed 2017-07-10) [Lookup]

User Login Items: ⓘ

    iTunesHelper    Application (Apple, Inc. - installed 2017-07-23)

        (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

    HOMERunner    Application - Hidden

        (~/Library/Application Support/TomTom HOME/HOMERunner.app)

    SpeechSynthesisServer    Application

        (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)

    Fantastical    Application

        (/Applications/Fantastical.app)

    Calendar    Application

        (/Applications/Calendar.app)

    EnhancedVideo    Application

        (~/Applications/EnhancedVideo.app)

    DuetPopUp    Application

        (/System/Library/Extensions/DuetPlugIn.bundle/Contents/DuetPopUp.app)

    EvernoteHelper    SMLoginItem - Hidden (Apple, Inc. - installed 2017-05-20)

        (/Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)

Internet Plug-ins: ⓘ

    SkyCaddiePlugIn: 1.02 (installed 2011-01-02) [Lookup]

    AmazonMP3DownloaderPlugin1017287: Unknown

    Google Earth Web Plug-in: 6.0 (installed 2011-05-17) [Lookup]

    Default Browser: 601 (installed 2016-08-11)

    Flip4Mac WMV Plugin: 2.3.6.5 (installed 2010-11-23) [Lookup]

    Musicnotes: 1.16.12 (installed 2008-06-15) [Lookup]

    OfficeLiveBrowserPlugin: 12.3.6 (installed 2013-04-12) [Lookup]

    AdobePDFViewerNPAPI: 17.012.20095 (installed 2017-08-11) [Lookup]

    FlashPlayer-10.6: 26.0.0.151 (installed 2017-08-08) [Lookup]

    Silverlight: 5.1.50428.0 (installed 2016-07-08) [Lookup]

    QuickTime Plugin: 7.7.3 (installed 2017-05-20)

    Flash Player: 26.0.0.151 (installed 2017-08-08) [Lookup]

    iPhotoPhotocast: 7.0 (installed 2012-07-02)

    SiteAdvisor: 2.0 (installed 2014-12-05) [Lookup]

    AdobePDFViewer: 17.012.20095 (installed 2017-08-11) [Lookup]

    GarminGpsControl: 4.1.0.0 Release (installed 2013-10-09) [Lookup]

    Scorch: 5.2.5 (installed 2009-12-06) [Lookup]

    JavaAppletPlugin: 15.0.1 (installed 2016-02-27) Check version

User internet Plug-ins: ⓘ

    bjnplugin_2.90.553.5: bjnplugin 2.90.553.5 (installed 2015-03-12) [Lookup]

    rbjninstallplugin_2.110.80.5: rbjninstallplugin 2.110.80.5 (installed 2015-10-14) [Lookup]

    CitrixOnlineWebDeploymentPlugin: 1.0.105 (installed 2013-04-25) [Lookup]

    bjninstallplugin_2.90.553.5: bjninstallplugin 2.90.553.5 (installed 2015-03-12) [Lookup]

    rbjnplugin_2.110.80.5: rbjnplugin 2.110.80.5 (installed 2015-10-14) [Lookup]

Safari Extensions: ⓘ

    [not loaded]    SiteAdvisor - McAfee - https://www.siteadvisor.com (installed 2016-11-16)

3rd Party Preference Panes: ⓘ

    Flash Player (installed 2017-07-24) [Lookup]

    Flip4Mac WMV (installed 2010-11-23) [Lookup]

    Logitech Control Center (installed 2008-05-26) [Lookup]

    Rapport (installed 2010-06-30) [Lookup]

Time Machine: ⓘ

    Skip System Files: NO

    Mobile backups: OFF

    Auto backup: YES

    Volumes being backed up:

        Macintosh HD: Disk size: 999.35 GB Disk used: 285.84 GB

    Destinations:

        TIME CAP [Local]

        Total size: 4.00 TB

        Total number of backups: 119

        Oldest backup: 9/1/15, 7:17 AM

        Last backup: 9/1/17, 8:46 AM

        Size of backup disk: Excellent

            Backup size 4.00 TB > (Disk size 999.35 GB X 3)

Top Processes by CPU: ⓘ

         6%       WindowServer

         6%       Finder

         5%       kernel_task

         1%       VShieldScanner

         1%       VShieldTaskManager

Top Processes by Memory: ⓘ

    775 MB        kernel_task

    440 MB        firefox

    273 MB        softwareupdated

    175 MB        Airmail 3

    147 MB        QuickLookSatellite

Top Processes by Energy Use: ⓘ

     11.88    VShieldScanner

      8.30    WindowServer

      7.60    VShieldTaskManager

      7.04    Finder

Virtual Memory Information: ⓘ

    3.29 GB       Available RAM

    16 MB         Free RAM

    4.71 GB       Used RAM

    3.28 GB       Cached files

    183 MB        Swap Used

Software installs: ⓘ

    Adobe Flash Player:  (installed 2017-08-08)

    Adobe Acrobat Reader DC (17.012.20095):  (installed 2017-08-11)

    Microsoft AutoUpdate:  (installed 2017-08-18)

    Install information may not be complete.

Diagnostics Information: ⓘ

    2017-09-01 08:43:23    VShieldScanner Crash [Open]

        Cause:        crashed on child side of fork pre-exec

        *** error for object 0x81009204: incorrect checksum for freed object - object was probably modified after being freed.

    2017-08-22 01:19:39    Last shutdown cause: 0 - Power loss

Uninstall McCafee AV. No anti-virus or so-called "cleaning"apps are necessary or recommended for Mac OS. At best they use unnecessary resources and at worst they can bork your whole system. In your case VShieldScanner (part of McCafee is crashing.

You have a number of problems, first is you have MacAffee Antivirus installed which is worthless and is likely the cause of your problem. Mac OS was designed from the very beginning to be completely secure and only requires that it be kept up to date. Mac OS does not require any third party AV, cleaning or ANY third party maintenance utilities. Locate the uninstall process for uninstalling the AV app and uninstall it.

Next is you have worthless WD HD software installed which is also a potential problem. Please do the same and uninstall that.

Third you have a large amount of Internet Plugins installed, my hunch is many are not necessary and you aren't even aware they are installed. Please remove the ones you do not require, instructions are in Safari 8 (Yosemite): If you need to remove a plug-in

Thanks for the quick response.  That's very helpful.

最后更新：2017-09-02 01:58:41

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