here are my etrecheck results. (although EC's designation of performance as "good" still belies the issue of a protracted startup)
(So I've also run Linc Davis' shell script if that would be more elucidating; I'm inserting in this post also an excerpt from his script results--see below Etrecheck.)
EtreCheck version: 3.0.6 (315)
Report generated 2016-09-30 12:15:08
Download EtreCheck from https://etrecheck.com
Runtime 3:40
Performance: Good
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Beachballing
Description:
even at startup, which takes 6-8 minutes followed by sluggish launch of any apps!
Hardware Information: ⓘ
iMac (21.5-inch, Late 2013)
[Technical Specifications] - [User Guide] - [Warranty & Service]
iMac - model: iMac14,1
1 2.7 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
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n/ac
Video Information: ⓘ
Intel Iris Pro
iMac 1920 x 1080
System Software: ⓘ
macOS Sierra 10.12.1 (16B2333a) - Time since boot: about 2 hours
Disk Information: ⓘ
APPLE HDD ST1000LM024 disk0 : (1 TB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Audrey (disk0s2) / [Startup]: 998.70 GB (228.02 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Recovery HD (disk0s4) <not mounted> [Recovery]: 650 MB
USB Information: ⓘ
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
HP HP Officejet Pro 8610
Macally Peripherals Macally BUMPERMOUSE
LITEON Technology USB Keyboard
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Gatekeeper: ⓘ
Mac App Store and identified developers
Kernel Extensions: ⓘ
/System/Library/Extensions
[not loaded] com.FTDI.driver.FTDIUSBSerialDriver (2.2.18 - SDK 10.6 - 2016-09-28) [Support]
[not loaded] com.dexcom.driver.DexComUSB (1.0.0 - SDK 10.6 - 2016-09-28) [Support]
[not loaded] com.parentalctrl.kext.filter (3.6.7 - 2016-09-28) [Support]
[not loaded] com.prolific.driver.PL2303 (1.5.0 - SDK 10.6 - 2016-09-28) [Support]
[not loaded] com.squirrels.airparrot.framebuffer (1.6 - SDK 10.8 - 2016-09-28) [Support]
[not loaded] com.tandemdiabetes.tslim.kext (1.0 - 2016-09-28) [Support]
[not loaded] com.wacom.kext.pentablet (Pen Tablet 5.2.4-4 - 2016-09-28) [Support]
[not loaded] net.pocketmac.driver.BlackberryUSB (3.0.12 - 2016-09-28) [Support]
[not loaded] net.pocketmac.driver.BlackberryUSBDev (3.0.12 - 2016-09-28) [Support]
[loaded] org.dungeon.driver.SATSMARTDriver (0.8.1 - SDK 10.6 - 2016-09-28) [Support]
/System/Library/Extensions/DexComUSB.kext/Contents/Plugins
[not loaded] com.dexcom.driver.DexComUSBCDCACMControl (1.0.0 - SDK 10.6 - 2015-02-19) [Support]
[not loaded] com.dexcom.driver.DexComUSBCDCACMData (1.0.0 - SDK 10.6 - 2015-02-19) [Support]
System Launch Agents: ⓘ
[not loaded] 7 Apple tasks
[loaded] 167 Apple tasks
[running] 97 Apple tasks
System Launch Daemons: ⓘ
[not loaded] 39 Apple tasks
[loaded] 164 Apple tasks
[running] 100 Apple tasks
Launch Agents: ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (2016-09-23) [Support]
[running] com.adobe.AdobeCreativeCloud.plist (2016-08-22) [Support]
[loaded] com.oracle.java.Java-Updater.plist (2016-09-05) [Support]
[not loaded] com.smartlaunch.usbdetection.plist (2011-12-05) [Support]
Launch Daemons: ⓘ
[loaded] com.adobe.ARMDC.Communicator.plist (2016-09-23) [Support]
[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (2016-09-23) [Support]
[running] com.adobe.adobeupdatedaemon.plist (2016-09-02) [Support]
[running] com.adobe.agsservice.plist (2016-08-15) [Support]
[loaded] com.adobe.fpsaud.plist (2016-08-29) [Support]
[loaded] com.barebones.authd.plist (2011-10-29) [Support]
[loaded] com.malwarebytes.HelperTool.plist (2016-08-25) [Support]
[loaded] com.malwarebytes.MBAMHelperTool.plist (2016-03-05) [Support]
[loaded] com.microsoft.autoupdate.helpertool.plist (2016-08-03) [Support]
[loaded] com.microsoft.office.licensing.helper.plist (2015-03-11) [Support]
[loaded] com.oracle.java.Helper-Tool.plist (2016-09-05) [Support]
[failed] com.seagate.TBDecorator.plist (2013-10-11) [Support]
User Launch Agents: ⓘ
[loaded] com.adobe.AAM.Updater-1.0.plist (2012-06-20) [Support]
[running] com.akamai.single-user-client.plist (2016-09-01) [Support]
[loaded] com.google.keystone.agent.plist (2016-08-26) [Support]
[failed] com.spotify.webhelper.plist (2015-04-17) [Support]
User Login Items: ⓘ
Dropbox Application (/Applications/Dropbox.app)
Internet Plug-ins: ⓘ
AdobePDFViewerNPAPI: 15.017.20050 - SDK 10.11 (2016-06-30) [Support]
Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-16) [Support]
AdobePDFViewer: 15.017.20050 - SDK 10.11 (2016-06-30) [Support]
Unity Web Player: UnityPlayer version 4.3.3f1 - SDK 10.6 (2014-01-15) [Support]
googletalkbrowserplugin: 5.41.3.0 - SDK 10.8 (2015-12-11) [Support]
MacCouponPrinter2: Unknown (2008-05-06)
Scorch: 6.1.0 (2010-04-23) [Support]
iPhotoPhotocast: 7.0 - SDK 10.8 (2013-04-21)
PepperFlashPlayer: 23.0.0.162 - SDK 10.9 (2016-09-23) [Support]
Veoh Plugin: 3.0 (2007-03-19) [Support]
DirectorShockwave: 12.2.4r194 - SDK 10.6 (2016-02-22) [Support]
QuickTime Plugin: 7.7.3 (2016-09-28)
FlashPlayer-10.6: 23.0.0.162 - SDK 10.9 (2016-09-16) [Support]
AdobeAAMDetect: 3.0.0.0 - SDK 10.9 (2016-09-02) [Support]
ToontownBundleManager: Unknown (2009-06-25) [Support]
CANONiMAGEGATEWAYDL: 3.1.0.2 (2009-09-08) [Support]
Musicnotes: 1.18.8 (2010-09-20) [Support]
Silverlight: 5.1.30514.0 - SDK 10.6 (2014-12-22) [Support]
Google Earth Web Plug-in: 7.1 (2016-08-19) [Support]
Flip4Mac WMV Plugin: 2.4.0.11 (2011-12-06) [Support]
SharePointBrowserPlugin: 14.6.8 - SDK 10.6 (2016-09-17) [Support]
o1dbrowserplugin: 5.41.3.0 - SDK 10.8 (2015-12-15) [Support]
JavaAppletPlugin: Java 8 Update 101 build 13 (2016-09-05) Check version
WacomNetscape: 1.1.1-1 (2011-08-11) [Support]
User internet Plug-ins: ⓘ
CitrixOnlineWebDeploymentPlugin: 1.0.79 (2012-09-06) [Support]
fbplugin_1_0_3: Unknown (2010-02-26) [Support]
Google Earth Web Plug-in: 7.1 (2013-10-07) [Support]
Safari Extensions: ⓘ
Evernote Web Clipper - Evernote Corp. - http://evernote.com (2016-08-22)
3rd Party Preference Panes: ⓘ
Akamai NetSession Preferences (2016-09-01) [Support]
Flash Player (2016-08-29) [Support]
Flip4Mac WMV (2011-06-30) [Support]
Java (2016-09-05) [Support]
Time Machine: ⓘ
Skip System Files: NO
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Audrey: Disk size: 998.70 GB Disk used: 770.68 GB
Destinations:
Lafferty Archive II [Local]
Total size: 4.00 TB
Total number of backups: 6
Oldest backup: 8/22/16, 3:39 AM
Last backup: 9/2/16, 4:35 PM
Size of backup disk: Excellent
Backup size 4.00 TB > (Disk size 998.70 GB X 3)
Top Processes by CPU: ⓘ
6% mdworker(18)
5% WindowServer
4% kernel_task
2% sysmond
1% Activity Monitor
Top Processes by Memory: ⓘ
1.43 GB com.apple.WebKit.WebContent(7)
894 MB kernel_task
279 MB spindump
238 MB mdworker(18)
164 MB assistant_service
Virtual Memory Information: ⓘ
619 MB Free RAM
7.39 GB Used RAM (1.94 GB Cached)
18 MB Swap Used
Diagnostics Information: ⓘ
Sep 30, 2016, 12:11:08 PM /Library/Logs/DiagnosticReports/Google Chrome_2016-09-30-121108_[redacted].hang [Details]
/Applications/Google Chrome.app/Contents/MacOS/Google Chrome
Sep 30, 2016, 12:10:57 PM /Library/Logs/DiagnosticReports/OnyX_2016-09-30-121057_[redacted].hang [Details]
/Applications/OnyX.app/Contents/MacOS/OnyX
Sep 30, 2016, 10:17:17 AM ~/Library/Logs/DiagnosticReports/node_2016-09-30-101717_[redacted].crash [Details]
com.adobe.CCXProcess - /Applications/Utilities/Adobe Creative Cloud/*/CCXProcess.app/Contents/MacOS/CCXProcess
Sep 30, 2016, 10:15:40 AM ~/Library/Logs/DiagnosticReports/ProtectedCloudKeySyncing_2016-09-30-101540_[re dacted].crash [Details]
/System/Library/PrivateFrameworks/ProtectedCloudStorage.framework/Helpers/Prote ctedCloudKeySyncing
Sep 30, 2016, 10:03:42 AM Self test - passed
Sep 30, 2016, 08:50:20 AM ~/Library/Logs/DiagnosticReports/ProtectedCloudKeySyncing_2016-09-30-085020_[re dacted].crash
Sep 29, 2016, 08:49:57 PM /Library/Logs/DiagnosticReports/screensharingd_2016-09-29-204957_[redacted].cpu _resource.diag [Details]
Sep 29, 2016, 10:50:32 AM /Library/Logs/DiagnosticReports/screensharingd_2016-09-29-105032_[redacted].cpu _resource.diag [Details]
Sep 29, 2016, 10:10:27 AM /Library/Logs/DiagnosticReports/commandtohp_2016-09-29-101027_[redacted].crash
/Library/Printers/hp/cups/filters/commandtohp.filter/Contents/MacOS/commandtohp
Sep 29, 2016, 10:09:19 AM /Library/Logs/DiagnosticReports/commandtohp_2016-09-29-100919_[redacted].crash
Sep 29, 2016, 10:08:47 AM /Library/Logs/DiagnosticReports/commandtohp_2016-09-29-100847_[redacted].crash
Sep 29, 2016, 10:06:19 AM /Library/Logs/DiagnosticReports/commandtohp_2016-09-29-100619_[redacted].crash
Sep 29, 2016, 10:06:10 AM /Library/Logs/DiagnosticReports/commandtohp_2016-09-29-100610_[redacted].crash
Sep 29, 2016, 08:22:18 AM /Library/Logs/DiagnosticReports/ScreenSaverEngine_2016-09-29-082218_[redacted]. cpu_resource.diag [Details]
/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.ap p/Contents/MacOS/ScreenSaverEngine
Sep 28, 2016, 11:32:07 PM /Library/Logs/DiagnosticReports/ScreenSaverEngine_2016-09-28-233207_[redacted]. cpu_resource.diag [Details]
Sep 28, 2016, 11:26:27 PM /Library/Logs/DiagnosticReports/WindowServer_2016-09-28-232627_[redacted].cpu_r esource.diag [Details]
/System/Library/PrivateFrameworks/SkyLight.framework/Resources/WindowServer
Sep 28, 2016, 11:17:50 PM /Library/Logs/DiagnosticReports/commandtohp_2016-09-28-231750_[redacted].crash
Sep 28, 2016, 09:56:56 PM /Library/Logs/DiagnosticReports/commandtohp_2016-09-28-215656_[redacted].crash
Sep 28, 2016, 04:30:30 PM ~/Library/Logs/DiagnosticReports/Adobe CEF Helper_2016-09-28-163030_[redacted].crash
/Library/Application Support/Adobe/*/Adobe CEF Helper.app/Contents/MacOS/Adobe CEF Helper
Sep 28, 2016, 03:12:22 PM /Library/Logs/DiagnosticReports/commandtohp_2016-09-28-151222_[redacted].crash
Sep 28, 2016, 02:30:00 PM /Library/Logs/DiagnosticReports/commandtohp_2016-09-28-143000_[redacted].crash
Sep 28, 2016, 07:56:14 AM /Library/Logs/DiagnosticReports/AdobeGCClient_2016-09-28-075614_[redacted].cras h
/Library/Application Support/Adobe/*/AdobeGCClient.app/Contents/MacOS/AdobeGCClient
Sep 28, 2016, 02:03:40 AM /Library/Logs/DiagnosticReports/AdobeGCClient_2016-09-28-020340_[redacted].cras h
Sep 27, 2016, 12:50:44 PM ~/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2016-09-27-125044_ [redacted].crash
/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.We bKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent
97 System log
98
99 Sep 25 07:56:06 com.apple.usbmuxd: log filter changed from 4 to 6
100 Sep 25 23:00:58 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
101 Sep 26 23:01:17 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
102 Sep 27 23:00:45 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
103 Sep 27 23:07:51 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
104 Sep 28 02:01:21 com.apple.usbmuxd: log filter changed from 4 to 6
105 Sep 28 02:03:11 AdobeGCClient: libcoreservices: _dirhelper_userdir: 523: bootstrap_look_up returned 32
106 Sep 28 02:13:44 com.apple.usbmuxd: log filter changed from 4 to 6
107 Sep 28 07:40:22 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
108 Sep 28 08:15:35 com.apple.usbmuxd: log filter changed from 4 to 6
109 Sep 28 11:54:26 com.apple.usbmuxd: log filter changed from 4 to 6
110 Sep 28 14:33:46 com.apple.usbmuxd: log filter changed from 4 to 6
111 Sep 28 15:03:01 com.apple.usbmuxd: log filter changed from 4 to 6
112 Sep 28 15:15:19 com.apple.usbmuxd: log filter changed from 4 to 6
113 Sep 28 15:42:03 com.apple.usbmuxd: log filter changed from 4 to 6
114 Sep 28 15:45:14 com.apple.usbmuxd: log filter changed from 4 to 6
115 Sep 28 16:31:58 com.apple.usbmuxd: log filter changed from 4 to 6
116 Sep 28 18:22:47 com.apple.usbmuxd: log filter changed from 4 to 6
117 Sep 28 21:46:34 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
118 Sep 28 22:54:11 com.apple.usbmuxd: log filter changed from 4 to 6
119 Sep 28 22:57:23 com.apple.usbmuxd: log filter changed from 4 to 6
120 Sep 29 04:57:26 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
121 Sep 29 08:35:43 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
122 Sep 29 10:14:45 com.apple.usbmuxd: log filter changed from 4 to 6
123 Sep 30 04:59:40 Finder: libcoreservices: __create_or_fix_relative_directory: 940: __dirhelper_create_relative returned (os/kern) failure
124
125 launchd log
126
127 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
128 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
129 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
130 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
131 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
132 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
133 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
134 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not parse plist: path = /Library/LaunchAgents/com.smartlaunch.usbdetection.plist, error = 109: Invalid property list
135 Sep 29 10:44:05 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Failed to bootstrap path: path = /Library/LaunchAgents/com.smartlaunch.usbdetection.plist, error = 109: Invalid property list
136 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.hp.devicemonitor, error = 119: Service is disabled
137 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.getdropbox.dropbox.loginhelper, error = 119: Service is disabled
138 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.evernote.EvernoteHelper, error = 119: Service is disabled
139 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.evernote.EvernoteLauncher, error = 119: Service is disabled
140 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.apple.photostream-agent, error = 119: Service is disabled
141 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = J3CP9BBBN6.com.binarynights.LockoHelper, error = 119: Service is disabled
142 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.fiplab.MemoryCleanHelper, error = 119: Service is disabled
143 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.mint.quickview-launcher, error = 119: Service is disabled
144 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = J8RPQ294UB.com.skitch.SkitchHelper, error = 119: Service is disabled
145 Sep 29 10:44:48 com.apple.xpc.launchd.user.domain.502.100007.Aqua: Could not import service from caller: caller = otherbsd.391, service = com.intego.virusbarrierexpress.agent, error = 119: Service is disabled
146 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
147 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
148 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
149 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Service sets EnableTransactions=false and EnablePressuredExit=true, which makes no sense. Enabling Transactions.
150 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Could not parse plist: path = /Library/LaunchAgents/com.smartlaunch.usbdetection.plist, error = 109: Invalid property list
151 Sep 29 10:44:49 com.apple.xpc.launchd.domain.user.55: Failed to bootstrap path: path = /Library/LaunchAgents/com.smartlaunch.usbdetection.plist, error = 109: Invalid property list