Thanks, Brenden.
I'm using the EtreCheck you suggested and will see if it sheds any light on the problems. I have not used the Activity Monitor, so will use that the next time there's a problem. I'm going to print the results of the test below for your review and comment. Before I do, I really believe my Mac may need a system cleanse from all of the crap that's accumulated from migrating over the years. If you could also instruct me as to where I can find detailed instructions on reformatting, I'd appreciate it.
EtreCheck results:
EtreCheck version: 2.7.7 (237)
Report generated 2016-01-24 11:05:19
Download EtreCheck from http://etrecheck.com
Runtime 5:04
Performance: Below Average
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Check files] link for help with unknown 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 CPU: 4-core
8 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
Empty
BANK 1/DIMM1
Empty
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ⓘ
NVIDIA GeForce GTX 660M - VRAM: 512 MB
iMac 2560 x 1440
System Software: ⓘ
OS X Mavericks 10.9.5 (13F1603) - Time since boot: about 2 days
Disk Information: ⓘ
APPLE HDD ST1000DM003 disk0 : (1 TB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 999.35 GB (414.10 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ⓘ
DYMO DYMO LabelWriter 4XL
Apple Inc. iPhone
Apple, Inc. Keyboard Hub
Logitech USB Receiver
Apple, Inc Apple Keyboard
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. MacBook Air SuperDrive
Apple Inc. FaceTime HD Camera (Built-in)
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Apple Inc. Thunderbolt to FireWire Adapter
Gatekeeper: ⓘ
Mac App Store and identified developers
Unknown Files: ⓘ
~/Library/LaunchAgents/.dat014b.001
One unknown file found. [Check files]
Kernel Extensions: ⓘ
/Applications/TechTool Pro 7.app
[not loaded] com.micromat.driver.spdKernel (1 - SDK 10.8) [Support]
/Library/Extensions
[loaded] com.Logitech.Control Center.HID Driver (3.9.1 - SDK 10.8) [Support]
[loaded] com.logitech.manager.kernel.driver (5.40.1 - SDK 10.8) [Support]
/System/Library/Extensions
[loaded] com.Logitech.Unifying.HID Driver (1.3.0 - SDK 10.8) [Support]
[not loaded] com.dymo.usbprinterclassdriver.kext (1.1 - SDK 10.5) [Support]
[not loaded] com.seagate.driver.PowSecDriverCore (5.2.3 - SDK 10.4) [Support]
[not loaded] com.tomtom.driver.UsbEthernetGadget (1.0.0d1) [Support]
[not loaded] jp.co.epson.driver.EpsonNet_PSUSBNotSeize (1.0.0) [Support]
/System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.2.3 - SDK 10.4) [Support]
[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.2.3 - SDK 10.5) [Support]
[not loaded] com.seagate.driver.SeagateDriveIcons (5.2.3 - SDK 10.4) [Support]
Launch Agents: ⓘ
[running] com.Logitech.Control Center.Daemon.plist [Support]
[loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[loaded] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a...plist [Support]
[running] com.adobe.AdobeCreativeCloud.plist [Support]
[running] com.logitech.manager.daemon.plist [Support]
Launch Daemons: ⓘ
[loaded] com.adobe.ARMDC.Communicator.plist [Support]
[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist [Support]
[running] com.adobe.adobeupdatedaemon.plist [Support]
[loaded] com.adobe.agsservice.plist [Support]
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.malwarebytes.MBAMHelperTool.plist [Support]
User Launch Agents: ⓘ
[loaded] .dat014b.001 (hidden) [Support]
/Applications/SpamSieve.app/Contents/Frameworks/SpamSieveFramework.framework/Re sources/SpamSieveLaunchAgent /Applications/SpamSieve.app
[loaded] com.adobe.ARM.[...].plist [Support]
[loaded] com.linotype.FontFolderProtector.plist [Support]
User Login Items: ⓘ
TomTomMyDriveConnectHelper UNKNOWN (missing value)
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
MyDriveConnect UNKNOWN (missing value)
Default Folder X Helper Application (/Library/PreferencePanes/Default Folder X.prefPane/Contents/Resources/Default Folder X Helper.app)
MagicMenu Application (/Applications/StuffIt/MagicMenu.app)
Dropbox Application (/Applications/Dropbox.app)
TuneupMyMac UNKNOWN (missing value)
SecureClient Application (/opt/CPsrsc-50/bin/SecureClient.app)
Other Apps: ⓘ
[running] [0x0-0x3e03e].CCXProcess
[running] [0x0-0x48048].CCLibrary
[running] [0x0-0xb00b].com.adobe.Photoshop
[running] com.Growl.GrowlHelperApp.1440
[running] com.adobe.acc.AdobeDesktopService.88560.B6A6018E-1F55-419E-BB54-EDB196972BE0
[running] com.adobe.accmac.87680
[running] com.etresoft.EtreCheck.92784
[running] com.getdropbox.dropbox.38400
[running] com.stclairsoft.DefaultFolderX.helper.64800
[running] com.stuffit.MagicMenu.49136
Internet Plug-ins: ⓘ
DYMO NPAPI Addin: Version: 1.0 - SDK 10.4 [Support]
Default Browser: Version: 537 - SDK 10.9
Flip4Mac WMV Plugin: Version: 2.4.2.4 [Support]
DYMO Safari Addin: Version: Unknown - SDK 10.4 [Support]
CouponPrinter-FireFox: Version: Version 1.0.11
AdobeAAMDetect: Version: 3.0.0.0 - SDK 10.9 [Support]
FlashPlayer-10.6: Version: 20.0.0.286 - SDK 10.6 [Support]
AdobePDFViewerNPAPI: Version: 15.010.20056 - SDK 10.8 [Support]
OfficeLiveBrowserPlugin: Version: 12.3.2 [Support]
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 20.0.0.286 - SDK 10.6 [Support]
iPhotoPhotocast: Version: 7.0
SharePointBrowserPlugin: Version: 14.6.0 - SDK 10.6 [Support]
AdobePDFViewer: Version: 15.010.20056 - SDK 10.8 [Support]
Silverlight: Version: 5.1.40416.0 - SDK 10.6 [Support]
JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
3rd Party Preference Panes: ⓘ
Application Enhancer [Support]
Default Folder X [Support]
Flash Player [Support]
Flip4Mac WMV [Support]
Growl [Support]
Logitech Control Center [Support]
Logi Options Launcher [Support]
NetUpdate [Support]
TechTool Protection [Support]
WindowShade X [Support]
Time Machine: ⓘ
Skip System Files: NO
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Macintosh HD: Disk size: 999.35 GB Disk used: 585.25 GB
Destinations:
Seagate Backup Plus Drive [Local]
Total size: 2.00 TB
Total number of backups: 76
Oldest backup: 9/18/13, 12:37 AM
Last backup: 1/12/16, 4:43 PM
Size of backup disk: Adequate
Backup size 2.00 TB > (Disk used 585.25 GB X 3)
Top Processes by CPU: ⓘ
10% mdworker(6)
3% kernel_task
3% com.apple.WebKit.WebContent(12)
3% WindowServer
1% iTunes
Top Processes by Memory: ⓘ
2.98 GB com.apple.WebKit.WebContent(12)
846 MB kernel_task
279 MB iTunes
188 MB Mail
180 MB com.apple.WebKit.Plugin.64
Virtual Memory Information: ⓘ
21 MB Free RAM
7.00 GB Used RAM (551 MB Cached)
0 B Swap Used
Diagnostics Information: ⓘ
Jan 23, 2016, 07:10:48 PM ~/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2016-01-23-191048_ [redacted].crash
/System/Library/StagedFrameworks/Safari/WebKit.framework/Versions/A/XPCServices /com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent
Jan 21, 2016, 08:33:02 PM ~/Library/Logs/DiagnosticReports/launchd_2016-01-21-203302_[redacted].crash
launchd - /opt/CPsrsc-50/*/SecureClient.app/Contents/MacOS/SecureClient
Jan 21, 2016, 08:32:01 PM Self test - passed
Jan 21, 2016, 08:28:10 PM ~/Library/Logs/DiagnosticReports/LCCDaemon_2016-01-21-202810_[redacted].crash
com.Logitech.Control Center.Daemon - /Library/Application Support/Logitech.localized/*/LCCDaemon.app/Contents/MacOS/LCCDaemon
Jan 21, 2016, 08:26:00 PM ~/Library/Logs/DiagnosticReports/storeagent_2016-01-21-202600_[redacted].crash
/System/Library/PrivateFrameworks/CommerceKit.framework/Versions/A/Resources/st oreagent
Jan 21, 2016, 04:03:37 PM ~/Library/Logs/DiagnosticReports/Adobe InDesign CC 2015_2016-01-21-160337_[redacted].crash
com.adobe.InDesign - /Applications/Adobe InDesign CC 2015/Adobe InDesign CC 2015.app/Contents/MacOS/Adobe InDesign CC 2015
Jan 21, 2016, 04:03:12 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160312_[redacted].crash
com.adobe.cep.CEPHtmlEngine Helper - /Applications/Adobe InDesign CC 2015/Adobe InDesign CC 2015.app/Contents/MacOS/CEP/CEPHtmlEngine/CEPHtmlEngine.app/Contents/Frameworks /CEPHtmlEngine Helper.app/Contents/MacOS/CEPHtmlEngine Helper
Jan 21, 2016, 04:03:09 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160309_[redacted].crash
Jan 21, 2016, 04:03:07 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160307_[redacted].crash
Jan 21, 2016, 04:03:05 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160305_[redacted].crash
Jan 21, 2016, 04:03:02 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160302_[redacted].crash
Jan 21, 2016, 04:03:00 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160300_[redacted].crash
Jan 21, 2016, 04:02:57 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160257_[redacted].crash
Jan 21, 2016, 04:02:55 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160255_[redacted].crash
Jan 21, 2016, 04:02:52 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160252_[redacted].crash
Jan 21, 2016, 04:02:50 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160250_[redacted].crash
Jan 21, 2016, 04:02:47 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160247_[redacted].crash
Jan 21, 2016, 04:02:45 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160245_[redacted].crash
Jan 21, 2016, 04:02:42 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160242_[redacted].crash
Jan 21, 2016, 04:02:40 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160240_[redacted].crash
Jan 21, 2016, 04:02:38 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160238_[redacted].crash
Jan 21, 2016, 04:02:35 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160235_[redacted].crash
Jan 21, 2016, 04:02:33 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160233_[redacted].crash
Jan 21, 2016, 04:02:30 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160230_[redacted].crash
Jan 21, 2016, 04:02:28 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160228_[redacted].crash
Jan 21, 2016, 04:02:25 PM ~/Library/Logs/DiagnosticReports/CEPHtmlEngine Helper_2016-01-21-160225_[redacted].crash
Jan 21, 2016, 01:40:54 PM ~/Library/Logs/DiagnosticReports/launchd_2016-01-21-134054_[redacted].crash
Jan 21, 2016, 12:44:04 PM /Library/Logs/DiagnosticReports/Cyberduck_2016-01-21-124404_[redacted].hang
/Applications/Cyberduck.app/Contents/MacOS/Cyberduck
Jan 21, 2016, 12:20:23 PM ~/Library/Logs/DiagnosticReports/Adobe InDesign CC 2015_2016-01-21-122023_[redacted].crash