Thanks so much, Eric. Nothing seems to solve the issue. Here's the printout from Etrecheck;
EtreCheck version: 2.9.11 (264)
Report generated 2016-04-24 13:31:45
Download EtreCheck from https://etrecheck.com
Runtime 3:44
Performance: Good
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Other problem
Description:
Safari won’t open secondary page
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
16 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 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:ⓘ
OS X El Capitan 10.11.4 (15E65) - Time since boot: about one day
Disk Information:ⓘ
APPLE HDD HTS541010A9E662 disk0 : (1 TB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD A (disk0s2) / : 499.48 GB (323.09 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD B Photos (disk0s4) /Volumes/Macintosh HD B Photos : 499.08 GB (347.37 GB free)
USB Information:ⓘ
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
EPSON USB2.0 Printer (Hi-speed)
HP Deskjet 1050 J410 series
Apple, Inc. Keyboard Hub
Apple Inc. Apple Keyboard
Firewire Information:ⓘ
Newer Technology, Inc. Oxford ATA Device 00 800mbit - 800mbit max
EFI (disk1s1) <not mounted> : 210 MB
NT A1 Time Machine (disk1s2) /Volumes/NT A1 Time Machine : 350.00 GB (40.01 GB free)
NT A2 User Backup (disk1s3) /Volumes/NT A2 User Backup : 149.63 GB (43.63 GB free)
Thunderbolt Information:ⓘ
Apple Inc. thunderbolt_bus
Apple Inc. Thunderbolt to FireWire Adapter
Gatekeeper:ⓘ
Mac App Store and identified developers
Kernel Extensions:ⓘ
/Library/Application Support/HASP/kexts
[loaded] com.aladdin.kext.aksfridge (1.0.16332 - 2016-04-23) [Support]
/Library/Application Support/Hotspot Shield
[loaded] com.anchorfree.tun (1.1.1 - SDK 10.8 - 2016-04-24) [Support]
/Library/Extensions
[not loaded] com.gretagmacbeth.EyeOne.NoClassic (1.0.0 - 2016-04-11) [Support]
[loaded] com.sophos.kext.sav (9.4.52 - SDK 10.9 - 2016-04-11) [Support]
[loaded] com.sophos.nke.swi (9.4.52 - SDK 10.9 - 2016-04-11) [Support]
/System/Library/Extensions
[not loaded] com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6 - 2016-04-11) [Support]
[not loaded] com.FTDI.driver.FTDIUSBSerialDriver (1.1.2 - 2016-04-11) [Support]
Startup Items:ⓘ
Executor: Path: /Library/StartupItems/Executor
FTDIReEnumerate: Path: /Library/StartupItems/FTDIReEnumerate
ProTec6b: Path: /Library/StartupItems/ProTec6b
RetroRun: Path: /Library/StartupItems/RetroRun
Startup items are obsolete in OS X Yosemite
System Launch Agents:ⓘ
[not loaded] 7 Apple tasks
[loaded] 151 Apple tasks
[running] 80 Apple tasks
System Launch Daemons:ⓘ
[not loaded] 41 Apple tasks
[loaded] 156 Apple tasks
[running] 92 Apple tasks
Launch Agents:ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (2016-03-28) [Support]
[running] com.adobe.AdobeCreativeCloud.plist (2015-12-12) [Support]
[running] com.epson.eventmanager.agent.plist (2012-05-08) [Support]
[loaded] com.google.keystone.agent.plist (2016-03-02) [Support]
[running] com.sophos.uiserver.plist (2015-11-15) [Support]
[not loaded] com.splashtop.streamer-for-root.plist (2014-05-27) [Support]
[failed] com.splashtop.streamer-for-user.plist (2014-05-27) [Support]
[loaded] com.xrite.device.softwareupdate.plist (2015-08-19) [Support]
Launch Daemons:ⓘ
[loaded] com.adobe.SwitchBoard.plist (2013-02-04) [Support]
[running] com.adobe.adobeupdatedaemon.plist (2016-02-16) [Support]
[loaded] com.adobe.agsservice.plist (2015-10-12) [Support]
[loaded] com.adobe.fpsaud.plist (2016-04-15) [Support]
[running] com.aladdin.aksusbd.plist (2015-09-07) [Support]
[running] com.aladdin.hasplmd.plist (2015-09-07) [Support]
[running] com.anchorfree.ajaxserver.plist (2016-02-19) [Support]
[running] com.atomicbird.macaroni.launchd.plist (2016-04-24) [Support]
[loaded] com.bombich.ccc.plist (2014-02-20) [Support]
[running] com.bombich.ccchelper.plist (2014-10-18) [Support]
[loaded] com.google.keystone.daemon.plist (2016-03-02) [Support]
[running] com.sophos.common.servicemanager.plist (2016-02-16) [Support]
[failed] com.splashtop.streamer-daemon.plist (2014-05-27) [Support]
[failed] com.splashtop.streamer-srioframebuffer.plist (2014-05-27) [Support]
[running] com.xrite.device.xrdd.plist (2015-08-19) [Support]
User Launch Agents:ⓘ
[loaded] com.adobe.AAM.Updater-1.0.plist (2011-09-24) [Support]
[running] com.amazon.music.plist (2015-08-05) [Support]
[loaded] com.apple.SafariBookmarksSyncer.plist
[running] com.ecamm.printopia.plist (2016-01-25) [Support]
[running] com.prosofteng.DGMonitor.plist (2011-09-07) [Support]
User Login Items:ⓘ
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Mail Application Hidden (/Applications/Mail.app)
LaCie Backup Support Application Hidden (~/Library/Application Support/SilverKeeper/LaCie Backup Support.app)
Dropbox Application (/Applications/Dropbox.app)
Hotspot Shield Application (/Applications/Hotspot Shield.app)
i1ProfilerTray Application (/Applications/i1Profiler/i1ProfilerTray.app)
CCC User Agent Application (/Applications/Carbon Copy Cloner/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app)
Hotspot Shield Application Hidden (/Applications/Hotspot Shield.app)
Other Apps:ⓘ
[running] com.adobe.CCXProcess.229472
[running] com.adobe.acc.AdobeDesktopService.130912.1C586F8E-43C0-44B4-8D43-086397C7FE8F
[running] com.adobe.accmac.56352
[running] com.anchorfree.Hotspot_Shield.62752
[running] com.bombich.cccuseragent.222112
[running] com.evernote.EvernoteHelper
[running] com.getdropbox.dropbox.76512
[running] com.hp.scanModule3.215392.209E62B0-31C2-4383-8BDC-5D5322977BD4
[running] com.sophos.autoupdate
[running] com.sophos.configuration
[running] com.sophos.intercheck
[running] com.sophos.notification
[running] com.sophos.scan
[running] com.sophos.sxld
[running] com.sophos.webd
[loaded] com.sweetpproductions.Cookie5.Helper
[running] com.xrite.i1ProfilerTray.63072
[loaded] 399 Apple tasks
[running] 223 Apple tasks
Internet Plug-ins:ⓘ
Flip4Mac WMV Plugin: 2.4.0.11 (2011-11-06) [Support]
FlashPlayer-10.6: 21.0.0.226 - SDK 10.6 (2016-04-21) [Support]
AdobeExManDetect: AdobeExManDetect 1.1.0.0 - SDK 10.7 (2014-01-23) [Support]
QuickTime Plugin: 7.7.3 (2016-04-11)
Flash Player: 21.0.0.226 - SDK 10.6 (2016-04-21) [Support]
AdobeAAMDetect: 3.0.0.0 - SDK 10.9 (2016-02-16) [Support]
Default Browser: 601 - SDK 10.11 (2016-04-11)
Photo Center Plugin: Photo Center Plugin 1.1.2.2 (2007-12-27) [Support]
Google Earth Web Plug-in: 6.1 (2011-11-10) [Support]
Silverlight: 5.1.40728.0 - SDK 10.6 (2015-10-25) [Support]
iPhotoPhotocast: 7.0 - SDK 10.8 (2013-04-21)
User internet Plug-ins:ⓘ
RealPlayer Plugin: Unknown
3rd Party Preference Panes:ⓘ
Flash Player (2016-04-15) [Support]
Flip4Mac WMV (2011-06-30) [Support]
Growl (2012-09-17) [Support]
Macaroni (2009-09-18) [Support]
Printopia (2016-01-25) [Support]
Time Machine:ⓘ
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD A: Disk size: 499.48 GB Disk used: 176.39 GB
Destinations:
NT A1 Time Machine [Local]
Total size: 350.00 GB
Total number of backups: 71
Oldest backup: 10/13/15, 5:28 PM
Last backup: 4/24/16, 1:17 PM
Size of backup disk: Too small
Backup size 350.00 GB < (Disk used 176.39 GB X 3)
Top Processes by CPU:ⓘ
4% WindowServer
1% kernel_task
0% fontd
0% Adobe CEF Helper(3)
0% Creative Cloud
Top Processes by Memory:ⓘ
1.15 GB kernel_task
934 MB Adobe Photoshop CC 2015
475 MB softwareupdated
475 MB mds_stores
295 MB com.apple.WebKit.WebContent(4)
Virtual Memory Information:ⓘ
4.33 GB Free RAM
12.00 GB Used RAM (7.59 GB Cached)
0 B Swap Used
Diagnostics Information:ⓘ
Apr 24, 2016, 12:58:10 PM ~/Library/Logs/DiagnosticReports/Adobe Photoshop CC 2015_2016-04-24-125810_[redacted].crash
com.adobe.Photoshop - /Applications/Adobe Photoshop CC 2015/Adobe Photoshop CC 2015.app/Contents/MacOS/Adobe Photoshop CC 2015
Apr 23, 2016, 09:40:43 AM ~/Library/Logs/DiagnosticReports/suggestd_2016-04-23-094043_[redacted].crash
/System/Library/PrivateFrameworks/CoreSuggestions.framework/Versions/A/Support/ suggestd
Apr 23, 2016, 09:17:59 AM Self test - passed
Apr 22, 2016, 09:44:26 AM /Librar