Thanks BobHarris, I will watch those things. I did see many references in the Console to Chrome, so I uninstalled Chrome and reinstalled and performance is now "Excellent" according to EtreCheck. Below is the newest report after reinstalling Chrome.
EtreCheck version: 2.7.8 (238)
Report generated 2016-01-27 15:57:19
Download EtreCheck from http://etrecheck.com
Runtime 1:48
Performance: Excellent
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: <etrecheck://help/hardware> ⓘ <etrecheck://help/hardware>
iMac (Retina 5K, 27-inch, Late 2014)
[Technical Specifications] <http://support-sp.apple.com/sp/index?page=cpuspec&cc=GDR4&lang=en> - [User Guide] <http://support-sp.apple.com/sp/index?page=cpuuserguides&cc=GDR4&lang=en> - [Warranty & Service] <http://support.apple.com/kb/index?page=servicefaq&geo=United_States&product=Macd esktops>
iMac - model: iMac15,1
1 3.5 GHz Intel Core i5 CPU: 4-core
16 GB RAM Upgradeable - [Instructions]
<http://support-sp.apple.com/sp/index?page=cpumemory&cc=GDR4&lang=en> BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 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/ac
Video Information: <etrecheck://help/video> ⓘ <etrecheck://help/video>
AMD Radeon R9 M290X - VRAM: 2048 MB
iMac 4096 x 2304
SyncMaster 1680 x 1050 @ 60 Hz
System Software: <etrecheck://help/systemsoftware> ⓘ <etrecheck://help/systemsoftware>
OS X El Capitan 10.11.3 (15D21) - Time since boot: about 3 hours
Disk Information: <etrecheck://help/disk> ⓘ <etrecheck://help/disk>
APPLE SSD SM0128G disk0 : (121.33 GB) (Solid State - TRIM: Yes)
EFI (disk0s1) <not mounted> : 210 MB
Boot OS X (disk0s3) <not mounted> : 134 MB
Macintosh HD (disk2) / : 3.12 TB (2.22 TB free)
Core Storage: disk0s2 120.99 GB Online
Core Storage: disk1s2 3.00 TB Online
APPLE HDD ST3000DM001 disk1 : (3 TB) (Rotational)
EFI (disk1s1) <not mounted> : 210 MB
Recovery HD (disk1s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk2) / : 3.12 TB (2.22 TB free)
Core Storage: disk0s2 120.99 GB Online
Core Storage: disk1s2 3.00 TB Online
USB Information: <etrecheck://help/usb> ⓘ <etrecheck://help/usb>
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
Logitech USB Receiver
Western Digital My Book 111A 2 TB
EFI (disk3s1) <not mounted> : 210 MB
MyBook (disk3s2) /Volumes/MyBook : 2.00 TB (368.08 GB free)
Thunderbolt Information: <etrecheck://help/thunderbolt> ⓘ <etrecheck://help/thunderbolt>
Apple Inc. thunderbolt_bus
Gatekeeper: <etrecheck://help/gatekeeper> ⓘ <etrecheck://help/gatekeeper>
Mac App Store and identified developers
Unknown Files: <etrecheck://help/unknownfiles> ⓘ <etrecheck://help/unknownfiles>
/Library/LaunchAgents/Nomadesk.app.plist
One unknown file found. [Check files] <etrecheck://unknownfiles/check>
Kernel Extensions: <etrecheck://help/kernelextensions> ⓘ <etrecheck://help/kernelextensions>
/System/Library/Extensions
[loaded] com.nomadesk.driver.ReadonlyDriver (10 - SDK 10.7) [Support] <http://www.google.com/search?q=ReadonlyDriver+support+site:nomadesk.com>
Launch Agents: <etrecheck://help/launchagents> ⓘ <etrecheck://help/launchagents>
[failed] Nomadesk.app.plist [Support] <http://www.google.com/search?q=Nomadesk.app.plist+support+site:app.Nomadesk> [Details] <etrecheck://detail/NomadeskClient>
[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a...plist [Support] <http://www.google.com/search?q=com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014 c95072f92651fb65e1bf9c8e43c37a23d420d.plist+support+site:adobe.com>
[loaded] com.adobe.CS4ServiceManager.plist [Support] <http://www.google.com/search?q=com.adobe.CS4ServiceManager.plist+support+site:ad obe.com>
[running] com.brother.LOGINserver.plist [Support] <http://www.google.com/search?q=com.brother.LOGINserver.plist+support+site:brothe r.com>
Launch Daemons: <etrecheck://help/launchdaemons> ⓘ <etrecheck://help/launchdaemons>
[loaded] com.adobe.ARMDC.Communicator.plist [Support] <http://www.google.com/search?q=com.adobe.ARMDC.Communicator.plist+support+site:a dobe.com>
[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist [Support] <http://www.google.com/search?q=com.adobe.ARMDC.SMJobBlessHelper.plist+support+si te:adobe.com>
[loaded] com.adobe.versioncueCS4.plist [Support] <http://www.google.com/search?q=com.adobe.versioncueCS4.plist+support+site:adobe. com>
User Launch Agents: <etrecheck://help/userlaunchagents> ⓘ <etrecheck://help/userlaunchagents>
[loaded] com.google.keystone.agent.plist [Support] <http://www.google.com/search?q=com.google.keystone.agent.plist+support+site:goog le.com>
User Login Items: <etrecheck://help/loginitems> ⓘ <etrecheck://help/loginitems>
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Dropbox Application (/Applications/Dropbox.app)
Google Drive Application (/Applications/Google Drive.app)
Nomadesk Application (/Applications/Nomadesk.app)
Messages Application (/Applications/Messages.app)
Other Apps: <etrecheck://help/hiddenapps> ⓘ <etrecheck://help/hiddenapps>
[running] 2BUA8C4S2C.com.agilebits.onepassword4-helper
[running] com.adobe.Photoshop.50912
[running] com.apple.xpc.launchd.oneshot.0x10000003.1Password 6
[running] com.apple.xpc.launchd.oneshot.0x10000005.NomadeskClient
[running] com.apple.xpc.launchd.oneshot.0x10000008.Google Chrome
[running] com.brother.utility.NETserver.69792
[running] com.brother.utility.USBserver.69472
[running] com.etresoft.EtreCheck.129312
[running] com.getdropbox.dropbox.45792
[running] com.google.GoogleDrive.56352
[loaded] com.nomadesk.Nomadesk.50592
Internet Plug-ins: <etrecheck://help/internetplugins> ⓘ <etrecheck://help/internetplugins>
AdobePDFViewerNPAPI: Version: 15.009.20077 - SDK 10.8 [Support] <http://www.google.com/search?q=AdobePDFViewerNPAPI+support+site:adobe.com>
QuickTime Plugin: Version: 7.7.3
JavaAppletPlugin: Version: 15.0.1 - SDK 10.7 Check version <http://www.java.com/en/download/installed.jsp>
Default Browser: Version: 601 - SDK 10.11
Safari Extensions: <etrecheck://help/safariextensions> ⓘ <etrecheck://help/safariextensions>
1Password
3rd Party Preference Panes: <etrecheck://help/preferencepanes> ⓘ <etrecheck://help/preferencepanes>
Adobe Version Cue CS4 [Support] <http://www.google.com/search?q=Adobe%20Version%20Cue%20CS4+support+site:adobe.co m>
FUSE for OS X (OSXFUSE) [Support] <http://www.google.com/search?q=FUSE%20for%20OS%20X%20(OSXFUSE)+support+site:gith ub.com>
Time Machine: <etrecheck://help/timemachine> ⓘ <etrecheck://help/timemachine>
Skip System Files: NO
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Macintosh HD: Disk size: 3.12 TB Disk used: 898.33 GB
Destinations:
MyBook [Local]
Total size: 2.00 TB
Total number of backups: 6
Oldest backup: 1/18/16, 5:22 PM
Last backup: 1/23/16, 12:39 AM
Size of backup disk: Too small
Backup size 2.00 TB < (Disk used 898.33 GB X 3)
Top Processes by CPU: <etrecheck://help/cpu> ⓘ <etrecheck://help/cpu>
6% Google Chrome Helper(33)
6% WindowServer
4% coreaudiod
3% Google Chrome
2% kernel_task
Top Processes by Memory: <etrecheck://help/memory> ⓘ <etrecheck://help/memory>
4.59 GB Google Chrome Helper(33)
1.23 GB kernel_task
459 MB solfs(9)
279 MB Google Chrome
213 MB mdworker(11)
Virtual Memory Information: <etrecheck://help/vm> ⓘ <etrecheck://help/vm>
79 MB Free RAM
16.00 GB Used RAM (8.20 GB Cached)
4 MB Swap Used
Diagnostics Information: <etrecheck://help/diagnostics> ⓘ <etrecheck://help/diagnostics>
Jan 27, 2016, 12:42:54 PM Self test - passed
Jan 26, 2016, 04:59:01 PM /Library/Logs/DiagnosticReports/Google Drive_2016-01-26-165901_[redacted].crash
com.google.GoogleDrive - /Applications/Google Drive.app/Contents/MacOS/Google Drive
Jan 26, 2016, 04:20:47 PM /Library/Logs/DiagnosticReports/Finder_2016-01-26-162047_[redacted].cpu_resourc e.diag [Details] <etrecheck://detail//Library/Logs/DiagnosticReports/Finder_2016-01-26-162047_%5Br edacted%5D.cpu_resource.diag>
/System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Jan 26, 2016, 03:37:19 PM ~/Library/Logs/DiagnosticReports/FinderSyncAPIExtension_2016-01-26-153719_[reda cted].crash
com.google.GoogleDrive.FinderSyncAPIExtension - /Applications/Google Drive.app/Contents/PlugIns/FinderSyncAPIExtension.appex/Contents/MacOS/FinderSy ncAPIExtension
Jan 26, 2016, 03:35:19 PM ~/Library/Logs/DiagnosticReports/FinderSyncAPIExtension_2016-01-26-153519_[reda cted].crash
Jan 26, 2016, 03:34:39 PM ~/Library/Logs/DiagnosticReports/FinderSyncAPIExtension_2016-01-26-153439_[reda cted].crash
Jan 26, 2016, 09:25:41 AM ~/Library/Logs/DiagnosticReports/FinderSyncAPIExtension_2016-01-26-092541_[reda cted].crash