Hi Eric - Thanks for the follow-up. I have tried the following:
* Created a new administrator account and I tried to play Netflix content in Safari and I encountered the same problem.
* I booted into Safe mode and I was able to play Netflix content in the Safari browser with no issues.
* I had previously tried viewing Netflix with all extensions/plug-ins disabled and that did not help. I have reenabled them for now.
* I rebooted normally and I have run Etrecheck which generated the following results:
EtreCheck version: 3.0.5 (309)
Report generated 2016-09-23 18:08:43
Download EtreCheck from https://etrecheck.com
Runtime 12:52
Performance: Poor
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Other problem
Description:
Netflix video playback does not work in Safari
Hardware Information: ⓘ
iMac (27-inch, Mid 2011)
[Technical Specifications] - [User Guide] - [Warranty & Service]
iMac - model: iMac12,2
1 2.7 GHz Intel Core i5 CPU: 4-core
16 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
4 GB DDR3 1333 MHz ok
BANK 1/DIMM0
4 GB DDR3 1333 MHz ok
BANK 0/DIMM1
4 GB DDR3 1333 MHz ok
BANK 1/DIMM1
4 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ⓘ
AMD Radeon HD 6770M - VRAM: 512 MB
iMac 2560 x 1440
System Software: ⓘ
macOS Sierra 10.12 (16A323) - Time since boot: less than an hour
Disk Information: ⓘ
ST31000528AS disk0 : (1 TB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 999.35 GB (67.52 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
HL-DT-STDVDRW GA32N ()
USB Information: ⓘ
Fitbit Inc. Fitbit Base Station
Apple Computer, Inc. IR Receiver
Apple Card Reader
Apple Inc. FaceTime HD Camera (Built-in)
Seagate FreeAgent GoFlex
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Configuration files: ⓘ
/etc/sudoers, File size 2299 but expected 1563
/etc/hosts - Count: 4
Gatekeeper: ⓘ
Mac App Store and identified developers
Kernel Extensions: ⓘ
/Library/Application Support/VirtualBox
[loaded] org.virtualbox.kext.VBoxDrv (5.0.20 - 2016-06-07) [Support]
[loaded] org.virtualbox.kext.VBoxNetAdp (5.0.20 - 2016-06-07) [Support]
[loaded] org.virtualbox.kext.VBoxNetFlt (5.0.20 - 2016-06-07) [Support]
[loaded] org.virtualbox.kext.VBoxUSB (5.0.20 - 2016-06-07) [Support]
/Library/Extensions
[loaded] com.paragon-software.filesystems.ntfs (14.2.288 - SDK 10.5 - 2016-09-22) [Support]
[not loaded] expressvpn.tap (20150118 - 2016-09-22) [Support]
[not loaded] expressvpn.tun (20150118 - 2016-09-22) [Support]
/System/Library/Extensions
[not loaded] com.aliph.driver.jstub (1.1.2 - SDK 10.7 - 2016-09-22) [Support]
[not loaded] com.elgato.driver.DontMatchAfaTech (1.1 - 2016-09-22) [Support]
[not loaded] com.elgato.driver.DontMatchCinergy450 (1.1 - 2016-09-22) [Support]
[not loaded] com.elgato.driver.DontMatchCinergyXS (1.1 - 2016-09-22) [Support]
[not loaded] com.elgato.driver.DontMatchEmpia (1.1 - 2016-09-22) [Support]
[not loaded] com.elgato.driver.DontMatchVoyager (1.1 - 2016-09-22) [Support]
[not loaded] com.makemkv.kext.daspi (1.3 - 2016-09-22) [Support]
[not loaded] com.seagate.driver.PowSecDriverCore (5.0.1 - 2016-09-22) [Support]
/System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.0.1 - 2015-11-07) [Support]
[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.0.1 - 2015-11-07) [Support]
[not loaded] com.seagate.driver.SeagateDriveIcons (5.0.1 - 2015-11-07) [Support]
System Launch Agents: ⓘ
[not loaded] 8 Apple tasks
[loaded] 160 Apple tasks
[running] 103 Apple tasks
System Launch Daemons: ⓘ
[not loaded] com.apple.jetsamproperties.Mac.plist (2016-08-25) [Support]
[not loaded] 41 Apple tasks
[loaded] 155 Apple tasks
[running] 108 Apple tasks
Launch Agents: ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (2012-11-18) [Support]
[running] com.flipvideo.FlipShare.AutoRun.plist (2011-05-06) [Support]
[loaded] com.google.keystone.agent.plist (2016-07-11) [Support]
[loaded] com.oracle.java.Java-Updater.plist (2014-03-04) [Support]
[running] com.paragon-software.NTFS.fsnotify.agent.plist (2016-08-29) [Support]
[loaded] com.paragon-software.facebook.agent.plist (2016-08-29) [Support]
Launch Daemons: ⓘ
[loaded] com.adobe.SwitchBoard.plist (2012-11-17) [Support]
[loaded] com.adobe.fpsaud.plist (2016-08-29) [Support]
[failed] com.expressvpn.tap.plist (2016-09-20)
[failed] com.expressvpn.tun.plist (2016-09-20)
[running] com.flipvideo.FlipShareServer.launchd.plist (2011-04-20) [Support]
[loaded] com.google.keystone.daemon.plist (2016-09-01) [Support]
[loaded] com.macpaw.CleanMyMac3.Agent.plist (2016-09-22) [Support]
[loaded] com.malwarebytes.HelperTool.plist (2016-07-14) [Support]
[loaded] com.microsoft.office.licensing.helper.plist (2012-04-02) [Support]
[loaded] com.oracle.java.Helper-Tool.plist (2014-03-04) [Support]
[running] com.paragon-software.NTFS.fsnotify.daemon.plist (2016-08-29) [Support]
[loaded] com.paragon.NTFS.launch.plist (2016-08-29)
[not loaded] org.virtualbox.startup.plist (2016-06-07) [Support]
User Launch Agents: ⓘ
[loaded] com.adobe.ARM.[...].plist (2012-09-06) [Support]
[loaded] com.macpaw.CleanMyMac3.Scheduler.plist (2015-12-29)
User Login Items: ⓘ
iTunesHelper Application Hidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
VMware Fusion Start Menu Application (/Applications/VMware Fusion.app/Contents/Library/VMware Fusion Start Menu.app)
Dropbox Application (/Applications/Dropbox.app)
CleanMyMac 3 Menu Application (/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app)
Internet Plug-ins: ⓘ
JavaAppletPlugin: Java 8 Update 91 build 14 (2016-05-19) Check version
nplastpass: 2.0.7 (2012-08-23) [Support]
AmazonMP3DownloaderPlugin1017277: AmazonMP3DownloaderPlugin 1.0.17 (2012-09-24) [Support]
AdobePDFViewerNPAPI: 10.1.16 (2015-10-28) [Support]
FlashPlayer-10.6: 23.0.0.162 - SDK 10.9 (2016-09-23) [Support]
Silverlight: 5.1.50709.0 - SDK 10.6 (2016-09-23) [Support]
QuickTime Plugin: 7.7.3 (2016-09-13)
Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-23) [Support]
PepperFlashPlayer: 23.0.0.162 - SDK 10.9 (2016-09-14) [Support]
SharePointBrowserPlugin: 14.6.6 - SDK 10.6 (2016-07-27) [Support]
AdobePDFViewer: 10.1.16 (2015-10-28) [Support]
DirectorShockwave: 12.0.4r144 - SDK 10.6 (2013-09-04) [Support]
Safari Extensions: ⓘ
LastPass - LastPass - http://lastpass.com (2014-03-17)
3rd Party Preference Panes: ⓘ
Flash Player (2016-08-29) [Support]
Java (2016-05-19) [Support]
Paragon NTFS for Mac® (2016-09-22) [Support]
Time Machine: ⓘ
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 999.35 GB Disk used: 931.82 GB
Destinations:
Data [Network]
Total size: 2.00 TB
Total number of backups: 66
Oldest backup: 2/22/16, 1:12 AM
Last backup: 9/23/16, 4:39 PM
Size of backup disk: Too small
Backup size 2.00 TB < (Disk used 931.82 GB X 3)
/sbin excluded from backup!
/usr excluded from backup!
/System excluded from backup!
/bin excluded from backup!
/private excluded from backup!
/Library excluded from backup!
/Applications excluded from backup!
Top Processes by CPU: ⓘ
5% com.apple.PhotoIngestService
4% WindowServer
2% kernel_task
2% com.apple.WebKit.WebContent(17)
2% com.apple.WebKit.Networking(3)
Top Processes by Memory: ⓘ
3.06 GB com.apple.WebKit.WebContent(17)
1.08 GB kernel_task
770 MB mdworker(22)
606 MB Safari(2)
377 MB assistant_service(2)
Virtual Memory Information: ⓘ
480 MB Free RAM
16.00 GB Used RAM (1.30 GB Cached)
0 B Swap Used
Diagnostics Information: ⓘ
Sep 23, 2016, 05:23:19 PM Self test - passed
Sep 22, 2016, 11:03:00 PM /Library/Logs/DiagnosticReports/Safari_2016-09-22-230300_[redacted].hang
/Applications/Safari.app/Contents/MacOS/Safari
Sep 22, 2016, 10:15:47 PM /Library/Logs/DiagnosticReports/media-indexer_2016-09-22-221547_[redacted].cpu_ resource.diag [Details]
/System/Library/PrivateFrameworks/AssistantServices.framework/Versions/A/XPCSer vices/media-indexer.xpc/Contents/MacOS/media-indexer
Sep 22, 2016, 09:30:54 AM /Library/Logs/DiagnosticReports/CleanMyMac 3 Menu_2016-09-22-093054_[redacted].cpu_resource.diag [Details]
/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app/Contents/MacOS/CleanMyMac 3 Menu