Q: Mid 2012 MacBook Pro CPU Sloooooow

Thanks for the advice, OGELTHORPE.  I had run Disk Utility, but not in recovery mode.  After running Disk Utility it seems my EtreCheck has come back in much better shape, but Safari is still crawling pretty slowly.  This is my concern:     100%    com.apple.WebKit.Networking  We'll see how it handles the work-day...and possibly consider booting again in recovery mode and reinstalling the OS X?

New EtreCheck:

EtreCheck version: 2.9.13 (267)

Report generated 2016-07-27 23:56:54

Download EtreCheck from https://etrecheck.com

Runtime 2:08

Performance: Excellent

Click the [Support] links for help with non-Apple products.

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

Problem: Computer is too slow

Hardware Information: ⓘ

    MacBook Pro (13-inch, Mid 2012)

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

    MacBook Pro - model: MacBookPro9,2

    1 2.9 GHz Intel Core i7 CPU: 2-core

    8 GB RAM Upgradeable - [Instructions]

        BANK 0/DIMM0

            4 GB DDR3 1600 MHz ok

        BANK 1/DIMM0

            4 GB DDR3 1600 MHz ok

    Bluetooth: Good - Handoff/Airdrop2 supported

    Wireless:  en1: 802.11 a/b/g/n

    Battery: Health = Normal - Cycle count = 397

Video Information: ⓘ

    Intel HD Graphics 4000

        Color LCD 1280 x 800

System Software: ⓘ

    OS X El Capitan 10.11.6 (15G31) - Time since boot: less than an hour

Disk Information: ⓘ

    APPLE HDD ST750LM022 disk0 : (750.16 GB) (Rotational)

        EFI (disk0s1) <not mounted> : 210 MB

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

        Macintosh HD (disk1) / : 748.93 GB (363.65 GB free)

            Core Storage: disk0s2 749.30 GB Online

    HL-DT-ST DVDRW  GS31N   ()

USB Information: ⓘ

    Apple Inc. FaceTime HD Camera (Built-in)

    Apple Inc. Apple Internal Keyboard / Trackpad

    Apple Computer, Inc. IR Receiver

    Apple Inc. BRCM20702 Hub

        Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

    Mac App Store and identified developers

Kernel Extensions: ⓘ

        /Applications/zoom.us.app

    [not loaded]    zoom.us.ZoomAudioDevice (1.1 - SDK 10.8 - 2016-06-09) [Support]

        /System/Library/Extensions

    [loaded]    com.dvdfab.kext.fabio (1.0 - 2016-07-27) [Support]

    [not loaded]    com.dymo.usbprinterclassdriver.kext (1.1 - SDK 10.10 - 2016-07-27) [Support]

    [loaded]    com.xxxchurch.x3nke (1.0.3 - SDK 10.8 - 2016-07-27) [Support]

System Launch Agents: ⓘ

    [not loaded]    7 Apple tasks

    [loaded]    158 Apple tasks

    [running]    73 Apple tasks

System Launch Daemons: ⓘ

    [not loaded]    45 Apple tasks

    [loaded]    158 Apple tasks

    [running]    88 Apple tasks

Launch Agents: ⓘ

    [failed]    com.adobe.ARMDCHelper.cc24aef4a1b90ed56a...plist (2016-07-12) [Support]

    [running]    com.dymo.dls.webservice.plist (2016-01-28) [Support]

    [loaded]    com.oracle.java.Java-Updater.plist (2014-03-05) [Support]

Launch Daemons: ⓘ

    [loaded]    com.adobe.ARMDC.Communicator.plist (2016-07-12) [Support]

    [loaded]    com.adobe.ARMDC.SMJobBlessHelper.plist (2016-07-12) [Support]

    [loaded]    com.adobe.fpsaud.plist (2016-06-28) [Support]

    [not loaded]    com.dymo.pnpd.plist (2016-01-28) [Support]

    [loaded]    com.microsoft.autoupdate.helpertool.plist (2016-03-26) [Support]

    [loaded]    com.microsoft.office.licensing.helper.plist (2014-03-26) [Support]

    [loaded]    com.microsoft.office.licensingV2.helper.plist (2016-07-09) [Support]

    [loaded]    com.oracle.java.Helper-Tool.plist (2014-03-05) [Support]

    [failed]    com.x3.x3daemon.plist (2014-04-26) [Support]

User Launch Agents: ⓘ

    [failed]    com.amazon.cloud-player.plist (2014-04-24) [Support]

    [not loaded]    com.apple.AddressBook.ScheduledSync.PHXC...plist

    [failed]    com.microsoft.LaunchAgent.SyncServicesAgent.plist (2016-07-07) [Support]

    [loaded]    com.spotify.webhelper.plist (2016-03-08) [Support]

User Login Items: ⓘ

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

Other Apps: ⓘ

    [running]    com.dymo.pnpd

    [running]    com.etresoft.EtreCheck.299232

    [running]    com.evernote.EvernoteHelper

    [loaded]    400 Apple tasks

    [running]    179 Apple tasks

Internet Plug-ins: ⓘ

    DYMO NPAPI Addin: 1.0 - SDK 10.10 (2016-01-28) [Support]

    Default Browser: 601 - SDK 10.11 (2016-07-27)

    AmazonMP3DownloaderPlugin101750: AmazonMP3DownloaderPlugin 1.0.17 - SDK 10.4 (2013-08-14) [Support]

    DYMO Safari Addin: Unknown - SDK 10.10 (2016-01-28) [Support]

    AdobePDFViewerNPAPI: 15.017.20050 - SDK 10.11 (2016-07-12) [Support]

    FlashPlayer-10.6: 22.0.0.209 - SDK 10.9 (2016-07-24) [Support]

    Silverlight: 5.1.30317.0 - SDK 10.6 (2014-05-01) [Support]

    QuickTime Plugin: 7.7.3 (2016-07-27)

    Flash Player: 22.0.0.209 - SDK 10.9 (2016-07-24) [Support]

    SharePointBrowserPlugin: 14.6.2 - SDK 10.6 (2016-03-26) [Support]

    AdobePDFViewer: 15.017.20050 - SDK 10.11 (2016-07-12) [Support]

    JavaAppletPlugin: Java 8 Update 71 build 15 (2016-01-23) Check version

User internet Plug-ins: ⓘ

    RingCentralMeetings: ZoomBundleVersionNumber - SDK 10.10 (2016-03-14) [Support]

    ZoomUsPlugIn: 3.5.49863.0509 - SDK 10.11 (2016-06-09) [Support]

Safari Extensions: ⓘ

    AdBlock - BetaFish, Inc. - https://getadblock.com (2016-05-20)

    ClickToPlugin - Marc Hoyois - http://hoyois.github.com/safariextensions/clicktoplugin/ (2016-05-26)

    Facebook Cleaner - Sonny Fazio - http://sonstermedia.com (2013-09-25)

3rd Party Preference Panes: ⓘ

    Flash Player (2016-06-28) [Support]

    Java (2016-01-23) [Support]

    X3 Watch (2014-05-29) [Support]

Time Machine: ⓘ

    Skip System Files: NO

    Mobile backups: ON

    Auto backup: YES

    Volumes being backed up:

        Macintosh HD: Disk size: 748.93 GB Disk used: 385.28 GB

    Destinations:

        SummitLIFE Creative [Local]

        Total size: 1.00 TB

        Total number of backups: 30

        Oldest backup: 1/2/15, 3:10 PM

        Last backup: 7/27/16, 9:20 PM

        Size of backup disk: Too small

            Backup size 1.00 TB < (Disk used 385.28 GB X 3)

Top Processes by CPU: ⓘ

       100%    com.apple.WebKit.Networking

         3%    kextd

         2%    fontd

         2%    WindowServer

         1%    kernel_task

Top Processes by Memory: ⓘ

    732 MB    kernel_task

    287 MB    com.apple.WebKit.WebContent

    172 MB    mdworker(11)

    156 MB    mds_stores

    139 MB    Safari

Virtual Memory Information: ⓘ

    4.19 GB    Free RAM

    3.81 GB    Used RAM (2.72 GB Cached)

    0 B    Swap Used

Diagnostics Information: ⓘ

    Jul 27, 2016, 11:56:10 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235610_[redacted].crash

        /private/etc/.x3/x3d

    Jul 27, 2016, 11:56:01 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235601_[redacted].crash

    Jul 27, 2016, 11:55:51 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235551_[redacted].crash

    Jul 27, 2016, 11:55:43 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235543_[redacted].crash

    Jul 27, 2016, 11:55:33 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235533_[redacted].crash

    Jul 27, 2016, 11:55:24 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235524_[redacted].crash

    Jul 27, 2016, 11:55:15 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235515_[redacted].crash

    Jul 27, 2016, 11:54:59 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235459_[redacted].crash

    Jul 27, 2016, 11:54:50 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235450_[redacted].crash

    Jul 27, 2016, 11:54:41 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235441_[redacted].crash

    Jul 27, 2016, 11:54:33 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235433_[redacted].crash

    Jul 27, 2016, 11:54:11 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235411_[redacted].crash

    Jul 27, 2016, 11:54:03 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235403_[redacted].crash

    Jul 27, 2016, 11:53:54 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235354_[redacted].crash

    Jul 27, 2016, 11:53:45 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235345_[redacted].crash

    Jul 27, 2016, 11:53:29 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235329_[redacted].crash

    Jul 27, 2016, 11:53:18 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235318_[redacted].crash

    Jul 27, 2016, 11:53:10 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235310_[redacted].crash

    Jul 27, 2016, 11:53:00 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235300_[redacted].crash

    Jul 27, 2016, 11:52:51 PM    /Library/Logs/DiagnosticReports/x3d_2016-07-27-235251_[redacted].crash

    Jul 27, 2016, 11:43:01 PM    Self test - passed

    Jul 27, 2016, 02:27:32 PM    /Library/Logs/DiagnosticReports/com.apple.WebKit.Networking_2016-07-27-142732_[ redacted].cpu_resource.diag [Details]

        /System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.We bKit.Networking.xpc/Contents/MacOS/com.apple.WebKit.Networking

    Jul 27, 2016, 12:02:23 PM    /Library/Logs/DiagnosticReports/com.apple.WebKit.Networking_2016-07-27-120223_[ redacted].cpu_resource.diag [Details]

    Jul 27, 2016, 11:35:40 AM    /Library/Logs/DiagnosticReports/Mail_2016-07-27-113540_[redacted].cpu_resource. diag [Details]

        /Applications/Mail.app/Contents/MacOS/Mail

    Jul 26, 2016, 08:49:51 AM    /Library/Logs/DiagnosticReports/com.apple.WebKit.Networking_2016-07-26-084951_[ redacted].cpu_resource.diag [Details]

Are there particular Apps your noticing?  I was using Evernote regularly long before the slow-down...and the OneNote App was just added today (it's a work-thing).  As for Spotify, Amazon Player, etc., I've deleted them, but there are still remnants lurking in various folders :-/

When it comes to Adobe, I'm suspect, and my BIGGEST concern is the line:     100%    com.apple.WebKit.Networking

Following the link instructions, Safari Networking is consistently utilizing 80-100 % CPU when loading a page. At rest, Safari sits near 0 (zero).

iTunes reads at 100 % CPU while working and rests near 0 zero.

Based upon the link, I'm not certain what exactly I'm looking for.  I do not note ANY apps eating CPU at rest.