Thanks for your suggestion. I ran the report, pasted here below my name. At the top of the report was a list of several adware with which the etrecheck report said my Mac was infected. I used the etrecheck feature to remove those files; and will watch to see if the problem is improved. I'd certainly be very interested in any other problems indicated by the report.
Thanks again!
Don
EtreCheck version: 3.0.5 (309)
Report generated 2016-09-28 14:01:38
Download EtreCheck from https://etrecheck.com
Runtime 16:36
Performance: Poor
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Remove] links to remove adware.
Problem: Computer is too slow
Description:
Both in OS-X and now in macOS Sierra V10.12, every few minutes my Mac slows and Activity Monitor shows at least one and sometimes up to three "Installer" processes running -- each consuming at least 1.5 gigs of memory. Obviously these put the Memory Pressure indicator in the red zone. When I force-quite this/these processes the memory pressure returns to the green (all the other processes each use 500MB memory (except kernel at 750MB) or less). Killing the Installer process(es) doesn't seem to adversely affect anything I've got running (typical set of apps: mail, calendar, contacts, messages, Safari (several tabs), etc.).
A few minutes later, up to about an hour later, my Mac again slows, I check the Activity Monitor, and find one or more "Installer" processes again running and consuming multi-gigs of memory.
Hardware Information: ⓘ
MacBook Air (13-inch, Mid 2011)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Air - model: MacBookAir4,2
1 1.8 GHz Intel Core i7 CPU: 2-core
4 GB RAM Not upgradeable
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en0: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 706
Video Information: ⓘ
Intel HD Graphics 3000
Thunderbolt Display 2560 x 1440
System Software: ⓘ
macOS Sierra 10.12 (16A323) - Time since boot: about 6 days
Disk Information: ⓘ
APPLE SSD SM256C disk0 : (251 GB) (Solid State - TRIM: Yes)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / [Startup]: 249.77 GB (16.03 GB free) (Low!)
Core Storage: disk0s2 250.14 GB Online
USB Information: ⓘ
Apple Inc. FaceTime Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Card Reader
Plantronics Plantronics C320
Apple Inc. MacBook Air SuperDrive
Apple Inc. FaceTime HD Camera (Display)
Apple Inc. Apple Thunderbolt Display
HP Photosmart C6100 series
Apple Inc. Display Audio
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Apple Inc. Thunderbolt Display
Configuration files: ⓘ
/etc/sudoers, File size 2299 but expected 1563
Gatekeeper: ⓘ
Mac App Store and identified developers
Adware: ⓘ
~/Library/Caches/com.apple.Safari/Extensions/Kuklorest.safariextension
~/Library/LaunchAgents/Epolife.AppVemoral.plist
~/Library/LaunchAgents/Epolife.btvlit.plist
~/Library/LaunchAgents/Epolife.dolnwoad.plist
~/Library/LaunchAgents/Epolife.uadpte.plist
~/Library/LaunchAgents/Manroling.update.plist
~/Library/LaunchAgents/Smokyashan.update.plist
~/Library/Safari/Extensions/Kuklorest.safariextz
8 adware files found. [Remove]
Unknown Files: ⓘ
~/Library/LaunchAgents/mg.update.plist
~/Library/Application Support/mg/MG.app/Contents/MacOS/MG
One unknown file found. [Check files]
Kernel Extensions: ⓘ
/Library/Extensions
[not loaded] com.Logitech.Control Center.HID Driver (3.9.1 - SDK 10.8 - 2016-09-21) [Support]
[not loaded] com.seagate.driver.PowSecDriverCore (5.2.7 (26995) - SDK 10.4 - 2016-09-21) [Support]
/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.2.7 (26995) - SDK 10.4 - 2016-01-24) [Support]
[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.2.7 (26995) - SDK 10.5 - 2016-01-24) [Support]
[not loaded] com.seagate.driver.SeagateDriveIcons (5.2.7 (26995) - SDK 10.4 - 2016-01-24) [Support]
/System/Library/Extensions
[not loaded] com.Logitech.Unifying.HID Driver (1.3.0 - SDK 10.6 - 2016-09-21) [Support]
[not loaded] com.sierrawireless.driver.SierraDIPSupport (1.0.0.7 - 2016-09-21) [Support]
[not loaded] com.sierrawireless.driver.SierraFSRSupport (3.0.0.2 - 2016-09-21) [Support]
[not loaded] com.sierrawireless.driver.SierraHSRSupport (3.0.0.16 - 2016-09-21) [Support]
[not loaded] com.sierrawireless.driver.SierraIPDirect (1.1.5 - 2016-09-21) [Support]
System Launch Agents: ⓘ
[not loaded] 8 Apple tasks
[loaded] 154 Apple tasks
[running] 67 Apple tasks
[killed] 42 Apple tasks
42 processes killed due to insufficient RAM
System Launch Daemons: ⓘ
[not loaded] com.apple.jetsamproperties.Mac.plist (2016-08-25) [Support]
[not loaded] 38 Apple tasks
[loaded] 152 Apple tasks
[running] 84 Apple tasks
[killed] 29 Apple tasks
29 processes killed due to insufficient RAM
Launch Agents: ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (2016-08-30) [Support]
[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (2016-07-11) [Support]
[loaded] com.carbonite.launchd.carbonitealerts.plist (2016-01-11) [Support]
[running] com.carbonite.launchd.carbonitestatus.plist (2016-01-11) [Support]
[loaded] com.citrix.AuthManager_Mac.plist (2013-10-22) [Support]
[loaded] com.citrix.ReceiverHelper.plist (2013-10-22) [Support]
[running] com.citrix.ServiceRecords.plist (2013-10-22) [Support]
[running] com.oracle.java.Java-Updater.plist (2012-12-30) [Support]
[running] com.rosettastone.rosettastonedaemon.plist (2015-08-01) [Support]
Launch Daemons: ⓘ
[loaded] com.adobe.ARMDC.Communicator.plist (2016-07-11) [Support]
[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (2016-07-11) [Support]
[running] com.adobe.agsservice.plist (2016-08-12) [Support]
[loaded] com.adobe.fpsaud.plist (2016-08-29) [Support]
[running] com.carbonite.launchd.carbonitedaemon.plist (2016-01-11) [Support]
[loaded] com.microsoft.autoupdate.helpertool.plist (2015-10-05) [Support]
[loaded] com.microsoft.office.licensing.helper.plist (2014-11-17) [Support]
[loaded] com.microsoft.office.licensingV2.helper.plist (2015-09-17) [Support]
[loaded] com.oracle.java.Helper-Tool.plist (2016-01-11) [Support]
[running] com.seagate.TBDecorator.plist (2013-10-11) [Support]
User Launch Agents: ⓘ
[loaded] Epolife.AppVemoral.plist (2016-08-26) Adware! [Remove]
~/Library/Application Support/Epolife/Epolife.app/Contents/MacOS/AppYM
[loaded] Epolife.btvlit.plist (2016-08-26) Adware! [Remove]
~/Library/Application Support/Epolife/Epolife.app/Contents/MacOS/AppYM
[loaded] Epolife.dolnwoad.plist (2016-08-26) Adware! [Remove]
~/Library/Application Support/Epolife/Epolife.app/Contents/MacOS/AppYM
[loaded] Epolife.uadpte.plist (2016-08-26) Adware! [Remove]
~/Library/Application Support/Epolife/Epolife.app/Contents/MacOS/AppYM
[loaded] Manroling.update.plist (2016-08-10) Adware! [Remove]
~/Library/Application Support/Manroling/Manroling.app/Contents/MacOS/AppNOS
[loaded] Smokyashan.update.plist (2016-08-26) Adware! [Remove]
~/Library/Application Support/Smokyashan/Smokyashan.app/Contents/MacOS/AppNOS
[failed] com.adobe.ARM.[...].plist (2015-03-21) [Support]
[running] com.akamai.single-user-client.plist (2016-09-01) [Support]
[loaded] com.citrixonline.GoToMeeting.G2MUpdate.plist (2015-08-04) [Support]
[loaded] com.logos.LogosIndexer.plist (2016-07-08) [Support]
[failed] com.seagate.dashboard.plist (2015-09-15) [Support]
[loaded] mg.update.plist (2016-07-06) [Support]
User Login Items: ⓘ
Dropbox Application (/Applications/Dropbox.app)
Internet Plug-ins: ⓘ
o1dbrowserplugin: 5.40.2.0 - SDK 10.8 (2015-02-02) [Support]
SqueakBrowserPlugin: 3.8.15b13 - SDK 10.6 (2016-02-24) [Support]
AdobePDFViewerNPAPI: 15.017.20053 - SDK 10.11 (2016-08-06) [Support]
FlashPlayer-10.6: 23.0.0.162 - SDK 10.9 (2016-09-20) [Support]
Silverlight: 5.1.41212.0 - SDK 10.6 (2016-02-02) [Support]
QuickTime Plugin: 7.7.3 (2016-09-13)
Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-20) [Support]
CitrixICAClientPlugIn: 11.8.2 - SDK 10.7 (2013-10-22) [Support]
SharePointBrowserPlugin: 14.5.5 - SDK 10.6 (2015-10-05) [Support]
AdobePDFViewer: 15.017.20053 - SDK 10.11 (2016-08-06) [Support]
googletalkbrowserplugin: 5.40.2.0 - SDK 10.8 (2015-01-27) [Support]
JavaAppletPlugin: Java 8 Update 91 build 14 (2016-08-30) Check version
User internet Plug-ins: ⓘ
CitrixOnlineWebDeploymentPlugin: 1.0.105 (2013-04-25) [Support]
WebEx64: 1.0 - SDK 10.6 (2013-07-11) [Support]
ZoomUsPlugIn: 3.5.64836.0908 - SDK 10.11 (2016-09-27) [Support]
Safari Extensions: ⓘ
WeatherBlink - Mindspark Interactive Network - http://www.weatherblink.com (2016-02-24)
Kuklorest - Kuklorest - http://www.kuklorest.com/faq#kuklorest (2015-09-26) Adware! [Remove]
3rd Party Preference Panes: ⓘ
Akamai NetSession Preferences (2016-09-01) [Support]
Carbonite (2016-02-12) [Support]
Flash Player (2016-08-29) [Support]
FUSE for macOS (2016-09-06) [Support]
Java (2016-05-02) [Support]
Logitech Control Center (2014-08-19) [Support]
Perian (2015-03-14) [Support]
Seagate Dashboard for Mac OSX (2016-01-24) [Support]
Time Machine: ⓘ
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 249.77 GB Disk used: 233.74 GB
Destinations:
Public [Network]
Total size: 4.96 TB
Total number of backups: 39
Oldest backup: 9/5/16, 5:02 PM
Last backup: 9/28/16, 12:35 PM
Size of backup disk: Excellent
Backup size 4.96 TB > (Disk size 249.77 GB X 3)
Top Processes by CPU: ⓘ
95% kernel_task
82% AppNOS
54% system_profiler
45% JavaApplicationStub
45% CarboniteDaemon
Top Processes by Memory: ⓘ
978 MB kernel_task
106 MB AppNOS
78 MB com.apple.WebKit.WebContent(7)
49 MB soagent
45 MB Dropbox
Virtual Memory Information: ⓘ
195 MB Free RAM
3.81 GB Used RAM (217 MB Cached)
38.08 GB Swap Used
Diagnostics Information: ⓘ
Sep 28, 2016, 11:45:17 AM /Library/Logs/DiagnosticReports/AppNOS_2016-09-28-114517_[redacted].cpu_resourc e.diag [Details]
/Volumes/*/Installer.app/Contents/MacOS/AppNOS
Sep 28, 2016, 10:40:31 AM /Library/Logs/DiagnosticReports/AppYM_2016-09-28-104031_[redacted].cpu_resource .diag [Details]
/Volumes/*/Installer.app/Contents/MacOS/AppYM
Sep 28, 2016, 08:03:16 AM /Library/Logs/DiagnosticReports/WORDsearch 11_2016-09-28-080316_[redacted].cpu_resource.diag [Details]
/Applications/WORDsearch 11.app/Contents/MacOS/WORDsearch 11
Sep 27, 2016, 02:17:36 PM /Library/Logs/DiagnosticReports/AppNOS_2016-09-27-141736_[redacted].cpu_resourc e.diag [Details]
Sep 27, 2016, 11:40:37 AM /Library/Logs/DiagnosticReports/AppNOS_2016-09-27-114037_[redacted].cpu_resourc e.diag [Details]
Sep 27, 2016, 10:40:54 AM /Library/Logs/DiagnosticReports/AppYM_2016-09-27-104054_[redacted].cpu_resource .diag [Details]
Sep 26, 2016, 02:17:59 PM /Library/Logs/DiagnosticReports/AppNOS_2016-09-26-141759_[redacted].cpu_resourc e.diag [Details]
Sep 26, 2016, 11:40:24 AM /Library/Logs/DiagnosticReports/AppNOS_2016-09-26-114024_[redacted].cpu_resourc e.diag [Details]
Sep 26, 2016, 10:41:45 AM /Library/Logs/DiagnosticReports/AppYM_2016-09-26-104145_[redacted].cpu_resource .diag [Details]
Sep 25, 2016, 04:50:54 PM /Library/Logs/DiagnosticReports/WORDsearch 11_2016-09-25-165054_[redacted].cpu_resource.diag [Details]
Sep 25, 2016, 02:17:36 PM /Library/Logs/DiagnosticReports/AppNOS_2016-09-25-141736_[redacted].cpu_resourc e.diag [Details]