77      iPhone_iPad_Mac_apple

2012 iMac 27" massively slow

For a long time now, my iMac has been almost uselessly slow in several areas.  For example:

• Bootup: ~ 30 minutes
• Fast User Switching: ~30 minutes for first switch to another user, ~5 minutes after that
• New Application Launch: up to 1-2 minutes in some cases (basically, uncomfortably slow)
• Inexplicable beachball for several minutes at a time

I have recently installed High Sierra, naively hoping this would help, but it has not.  No noticeable speed up in those areas.Here are some things I've done to try to speed this thing up:

• Literally wiped the HDD clean, reinstalled from the ground up (restored user profiles/data only from backup)
• Done the standard "clear PRAM" and "clear NVS"
• Been through several rounds of etreCheck-guided cleanups on system and user accounts (there are 5 user accounts)
• HW checks on HDD and RAM

I've long suspected that my problem is one of:

1. Stale/dead/incompatible system or user configuration files/settings
2. Bad HDD
3. Bad RAM

For #2 and 3, I've done hw checks, and everything seems to come back roses.  However, I still am suspect of one of those 2.

For #1, my complete rebuild from the ground up should have fixed that.

I am definitely at wits end here...Any help provided is appreciated.

Here is my latest etrecheck report:

EtreCheck version: 3.4.6 (460)

Report generated 2017-10-09 16:50:04

Download EtreCheck from https://etrecheck.com

Runtime: 8:13

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

Hardware Information: ⓘ

    iMac (27-inch, Late 2012)

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

    iMac - model: iMac13,2

    1 2.9 GHz Intel Core i5 (i5-3470S) CPU: 4-core

    24 GB RAM Upgradeable - [Instructions]

        BANK 0/DIMM0

            4 GB DDR3 1600 MHz ok

        BANK 1/DIMM0

            4 GB DDR3 1600 MHz ok

        BANK 0/DIMM1

            8 GB DDR3 1600 MHz ok

        BANK 1/DIMM1

            8 GB DDR3 1600 MHz ok

    Handoff/Airdrop2: supported

    Wireless:  en1: 802.11 a/b/g/n

    iCloud Quota: 1.78 TB available

Video Information: ⓘ

    NVIDIA GeForce GTX 660M - VRAM: 512 MB

        iMac 2560 x 1440

Disk Information: ⓘ

    APPLE HDD WDC WD10EALX-408EA0 disk0: (1 TB) (Rotational)

    [Show SMART report]

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

        (disk0s2) <not mounted>  [CoreStorage Container]: 998.83 GB

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

USB Information: ⓘ

     USB20Bus

         hub_device

            Apple, Inc. Keyboard Hub

                Apple Inc. Apple Keyboard

            Apple Inc. FaceTime HD Camera (Built-in)

     USB20Bus

         hub_device

             hub_device

                Apple Inc. BRCM20702 Hub

                    Apple Inc. Bluetooth USB Host Controller

     USB30Bus

Firewire Information: ⓘ

    WD My Passport 071D 800mbit - 800mbit max

        EFI (disk2s1 - MS-DOS FAT32) <not mounted>  [EFI]: 210 MB

        Kittyhawk System Clone (disk2s2 - Journaled HFS+) /Volumes/Kittyhawk System Clone : 999.35 GB (135.74 GB free)

        Recovery HD (disk2s3 - Journaled HFS+) <not mounted>  [Recovery]: 650 MB

        TimeMachine 1 Storage (disk2s4 - Journaled HFS+) /Volumes/TimeMachine 1 Storage : 999.24 GB (688.72 GB free)

        Boot OS X (disk2s5 - Journaled HFS+) <not mounted> : 134 MB

    WD My Book 800mbit - 800mbit max

        EFI (disk3s1 - MS-DOS FAT32) <not mounted>  [EFI]: 210 MB

        iMac Storage (disk3s2 - Journaled HFS+) /Volumes/iMac Storage : 999.85 GB (566.86 GB free)

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

        Apple Inc. Thunderbolt to FireWire Adapter

Virtual disks: ⓘ

    Macintosh FD (disk1 - Journaled HFS+) /  [Startup]: 998.47 GB (112.05 GB free)

        Physical disk: disk0s2 998.83 GB Online

System Software: ⓘ

    macOS High Sierra  10.13 (17A405) - Time since boot: about 4 hours

Gatekeeper: ⓘ

    Mac App Store and identified developers

Clean up: ⓘ

    /Library/LaunchDaemons/com.apple.xcscouch.plist

        ./bin/couchdb -a /Library/Developer/XcodeServer/Configuration/xcscouch.ini

        Executable not found!

    One orphan file found. [Clean up]

Kernel Extensions: ⓘ

        /Library/Extensions

    [loaded]    com.AmbrosiaSW.AudioSupport (4.1.4 - SDK 10.11) [Lookup]

    [loaded]    net.telestream.driver.TelestreamAudio (1.1.1 - SDK 10.8) [Lookup]

System Launch Agents: ⓘ

    [not loaded]    8 Apple tasks

    [loaded]    163 Apple tasks

    [running]    117 Apple tasks

System Launch Daemons: ⓘ

    [failed]    com.apple.newsyslog.plist (Apple, Inc. - installed 2017-10-03)

    [not loaded]    37 Apple tasks

    [loaded]    167 Apple tasks

    [running]    123 Apple tasks

Launch Agents: ⓘ

    [not loaded]    com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2017-04-14) [Lookup]

    [loaded]    com.adobe.AdobeCreativeCloud.plist (Adobe Systems, Inc. - installed 2017-04-14) [Lookup]

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

    [loaded]    com.oracle.java.Java-Updater.plist (? 739257b5 be93c7fb - installed 2016-11-11) [Lookup]

Launch Daemons: ⓘ

    [running]    com.adobe.adobeupdatedaemon.plist (Adobe Systems, Inc. - installed 2017-04-14) [Lookup]

    [running]    com.adobe.agsservice.plist (Adobe Systems, Inc. - installed 2017-09-26) [Lookup]

    [loaded]    com.adobe.fpsaud.plist (? 2afb3af7 4898e928 - installed 2017-08-29) [Lookup]

    [loaded]    com.ambrosiasw.ambrosiaaudiosupporthelper.daemon.plist (Ambrosia Software, Inc. - installed 2015-09-11) [Lookup]

    [not loaded]    com.apple.installer.cleanupinstaller.plist (? 1963bf56 0 - installed 2017-10-09)

    [running]    com.apple.serverd.plist (? 77315927 a1a871d1 - installed 2017-05-29)

    [running]    com.apple.xcscontrol.plist (Apple, Inc. - installed 2016-08-28)

    [failed]    com.apple.xcscouch.plist (? ? ? - installed 2016-11-11) - ./bin/couchdb: Executable not found!

    [failed]    com.apple.xcsd.plist (Apple, Inc. - installed 2016-08-28)

    [failed]    com.apple.xcsd.worker.plist (Apple, Inc. - installed 2016-08-28)

    [failed]    com.apple.xcsnginx.plist (Apple, Inc. - installed 2016-08-28)

    [failed]    com.apple.xcsredis.plist (Apple, Inc. - installed 2016-08-28)

    [running]    com.bombich.ccchelper.plist (Bombich Software, Inc. - installed 2017-09-30) [Lookup]

    [loaded]    com.google.keystone.daemon.plist (Google, Inc. - installed 2017-07-26) [Lookup]

    [loaded]    com.microsoft.office.licensing.helper.plist (? 6d8cb30e afb3bef0 - installed 2010-08-25) [Lookup]

    [loaded]    com.oracle.java.Helper-Tool.plist (Shell Script e3fefdd2 - installed 2016-09-23) [Lookup]

    [loaded]    com.sharpcast.xfsmond.plist (? 4b65e4ff 0 - installed 2017-09-23) [Lookup]

User Launch Agents: ⓘ

    [loaded]    com.citrixonline.GoToMeeting.G2MUpdate.plist (Citrix Online LLC - installed 2017-06-12) [Lookup]

    [loaded]    com.dropbox.DropboxMacUpdate.agent.plist (Dropbox, Inc. - installed 2017-08-13) [Lookup]

User Login Items: ⓘ

    iTunesHelper    Application (Apple, Inc. - installed 2017-09-13)

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

    Dropbox    Application

        (/Applications/Dropbox.app)

    SugarSync    Application

        (/Applications/SugarSync.app)

    CCC User Agent    Application (Bombich Software, Inc. - installed 2017-09-30)

        (/Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app)

Internet Plug-ins: ⓘ

    AdobeAAMDetect: 3.0.0.0 (installed 2017-04-14) [Lookup]

    FlashPlayer-10.6: 27.0.0.130 (installed 2017-09-12) [Lookup]

    QuickTime Plugin: 7.7.3 (installed 2017-10-03)

    Flash Player: 27.0.0.130 (installed 2017-09-12) [Lookup]

    o1dbrowserplugin: 5.41.3.0 (installed 2016-10-26) [Lookup]

    SharePointBrowserPlugin: 14.1.0 (installed 2016-08-22) [Lookup]

    googletalkbrowserplugin: 5.41.3.0 (installed 2015-12-11) [Lookup]

    JavaAppletPlugin: Java 8 Update 111 build 14 (installed 2016-11-11) Check version

User internet Plug-ins: ⓘ

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

    tblive-4: Unknown (installed 2016-10-11)

    ZoomUsPlugIn: 4.0.36452.0616 (installed 2017-06-29) [Lookup]

Safari Extensions: ⓘ

    [enabled]    Ebates Cash Back - Ebates Performance Marketing, Inc. - https://ebates.com/ (installed 2017-09-21)

    [enabled]    Honey - Honey Science Corporation - https://www.joinhoney.com (installed 2017-09-13)

3rd Party Preference Panes: ⓘ

    Flash Player (installed 2017-08-29) [Lookup]

    FUSE for macOS (installed 2016-09-06) [Lookup]

    Java (installed 2016-11-11) [Lookup]

Time Machine: ⓘ

    Skip System Files: NO

    Auto backup: YES

    Volumes being backed up:

        Macintosh FD: Disk size: 998.47 GB Disk used: 886.42 GB

    Destinations:

        iMac Storage [Local]

        Total size: 999.85 GB

        Total number of backups: 70

        Oldest backup: 4/15/17, 8:54 PM

        Last backup: 10/9/17, 9:09 AM

        Size of backup disk: Too small

            Backup size 999.85 GB < (Disk used 886.42 GB X 3)

Top Processes by CPU: ⓘ

        18%   mds

        18%   com.apple.WebKit.WebContent

         5%   WindowServer

         4%   backupd

         4%   kernel_task

Top Processes by Memory: ⓘ

    1.41 GB   kernel_task

    905 MB    com.apple.WebKit.WebContent

    686 MB    softwareupdated

    539 MB    mds_stores

    463 MB    Safari

Top Processes by Network Use: ⓘ

    Input     Output    Process name

    10 MB     927 KB    com.apple.WebKit.Networking

    4 MB      95 KB     mDNSResponder

    69 KB     152 KB    Dropbox

    71 KB     88 KB     Safari

    39 KB     37 KB     apsd

Top Processes by Energy Use: ⓘ

     36.35 com.apple.WebKit

     11.56 WindowServer

      5.82 Safari

      4.76 AddressBookSourceSync

Virtual Memory Information: ⓘ

    15.37 GB  Available RAM

    1.99 GB   Free RAM

    8.63 GB   Used RAM

    13.38 GB  Cached files

    0 B       Swap Used

Software installs (last 30 days): ⓘ

    Adobe Flash Player:  (installed 2017-09-12)

    mSecure: 3.5.7 (installed 2017-09-29)

    SketchBook: 8.5.0 (installed 2017-10-04)

    Install information may not be complete.

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

    2017-10-09 16:21:07    SugarSync.app High CPU use [Open] [Details]

    2017-10-09 12:15:13    WindowServer Crash [Open]

        Cause:        StartTime:2017-10-09 12:13:35

        GPU:

        VirtDisplay0

        Assertion failed: (0 && "Attempting to get MTLTexture with no MTLDevice"), function GetMTLTexture, file /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreDisplay/CoreDisplay-79.7/Co reDisplay/Display/DisplaySurface.mm, line 498.

I suspect a failing HD, you may want to book an appointment at your local Apple Store and have it professionally diagnosed and tested.

I suggest temporarily disconnecting your external WD storage device(s) then reboot the iMac to see if you experience the same sluggishness.

Performance issues like you describe can result from a hard drive that is experiencing read errors. If you haven't already done so, click on the Etrecheck SMART Report in the Disk Information section to see whether there are any SMART errors. No matter the result, it's always a good idea to make sure you have at least one good backup of your data.

It looks like you recently upgraded to High Sierra. Open the Activity Monitor application to see if your iMac is performing any CPU intensive tasks that might explain the issue. In most cases sluggishness following a recent OS upgrade is temporary and should resolve itself.

Please let us know what you find and how you resolved the issue. Good luck.

• Interesting thought on removing the external storage...why do you suggest that?  Is that a known sore spot in these situations?  I am trying that later on and will let you know.
• I have checked the SMART report...no issues
• I've been watching activity monitor for years as I track this issue, and I've never spotted anything that was blowing up the CPU or the r/w on the disk

Thank you so much for your help on this!  We're going down the external drive road for now...

Thanks for the help here...yes, I have also suspected my drive was a problem for the last couple of years (length of this issue).  Unfortunately, Apple Store is really a viable option.

Any ideas on how I might diagnose it myself?

最后更新：2017-10-11 08:40:52

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