macOS Sierra Unlock Takes 6-8 minutes after Safari 11.0.2 Update

Hi. My Late 2009 iMac 21.5" with 12GB RAM and 256 GB SSD has been working wonderfully for the past year after installing SSD and updating to Sierra. No issues browsing web and using Office applications. However, after the installation of the Safari 11.0.2 update on Jan 9, 2018 my machine now takes between 6 and 8 minutes after entering the password to display the desktop. During this time, the dreaded beachball spins away.

Once the desktop appears, all applications work fine and are totally responsive (except Safari). They open and exit quickly. Chrome loads web pages quickly. However, Safari takes a very long time to initialize and displays as (Not Responding) in Activity Monitor. The same is true exiting Safari once it has initialized.

I have performed an SMC reset to no avail. I suspect the Safari 11.0.2 update is to blame given (A) the timing and (B) the fact that Safari is not performing correctly once the machine provides the desktop.

Any assistance would be greatly appreciated.

Thanks.

<<<<<<<<<<<<<<<<<<< ETRECHECK >>>>>>>>>>>>>>>>>>>>

EtreCheck version: 3.4.6 (460)

Report generated 2018-01-22 21:10:53

Download EtreCheck from https://etrecheck.com

Runtime: 2:09

Performance: Excellent

Click the [Lookup] links for more information from Apple Support Communities.

Click the [Details] links for more information about that line.

Problem: Beachballing

Hardware Information:ⓘ

iMac (21.5-inch, Late 2009)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac10,1

1 3.06 GHz Intel Core 2 Duo (Duo) CPU: 2-core

12 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

4 GB DDR3 1067 MHz ok

BANK 1/DIMM0

4 GB DDR3 1067 MHz ok

BANK 0/DIMM1

2 GB DDR3 1067 MHz ok

BANK 1/DIMM1

2 GB DDR3 1067 MHz ok

Handoff/Airdrop2: not supported

Wireless:
en1: 802.11 a/b/g/n

Video Information:ⓘ

NVIDIA GeForce 9400 - VRAM: 256 MB

iMac 1920 x 1080

Disk Information:ⓘ

PNY CS1311 240GB SSD disk0: (240.06 GB) (Solid State - TRIM: Yes)

[Show SMART report]

EFI (disk0s1 - MS-DOS FAT32) <not mounted>
[EFI]: 210 MB

Mac PNY SSD (disk0s2 - Journaled HFS+) /
[Startup]: 239.20 GB (110.31 GB free)

Recovery HD (disk0s3 - Journaled HFS+) <not mounted>
[Recovery]: 650 MB

PIONEER DVD-RW
DVRTS09
()

USB Information:ⓘ

USBBus

Apple Inc. BRCM2046 Hub

Apple Inc. Bluetooth USB Host Controller

USBBus

Apple Computer, Inc. IR Receiver

Microsoft Microsoft Nano Transceiver 1.1

USB20Bus

Apple Card Reader

USB20Bus

Apple Inc. Built-in iSight

System Software:ⓘ

macOS Sierra
10.12.6 (16G1114) - Time since boot: less than an hour

Gatekeeper:ⓘ

Mac App Store and identified developers

Kernel Extensions:ⓘ

/Library/Application Support/Citrix Receiver

[not loaded] com.citrix.kext.gusb (12.8.0 - SDK 10.9) [Lookup]

System Launch Agents:ⓘ

[not loaded] 7 Apple tasks

[loaded] 187 Apple tasks

[running] 91 Apple tasks

System Launch Daemons:ⓘ

[not loaded] 42 Apple tasks

[loaded] 177 Apple tasks

[running] 99 Apple tasks

Launch Agents:ⓘ

[running] com.citrix.AuthManager_Mac.plist (? b095ca60 9db56088 - installed 2017-12-16) [Lookup]

[running] com.citrix.ReceiverHelper.plist (? bbfad3f1 e843c9ac - installed 2017-12-16) [Lookup]

[running] com.citrix.ServiceRecords.plist (? 8e6543d 3d69aba9 - installed 2017-12-16) [Lookup]

Launch Daemons:ⓘ

[loaded] com.citrix.ctxusbd.plist (? 44dc9c9f 523fd46 - installed 2017-12-11) [Lookup]

[loaded] com.microsoft.autoupdate.helper.plist (Microsoft Corporation - installed 2017-09-24) [Lookup]

[loaded] com.microsoft.office.licensingV2.helper.plist (Microsoft Corporation - installed 2016-11-15) [Lookup]

User Launch Agents:ⓘ

[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2018-01-21) [Lookup]

User Login Items:ⓘ

Arq Agent Application (PhotoMinds LLC - installed 2017-11-22)

(/Applications/Arq.app/Contents/Library/LoginItems/Arq Agent.app)

iTunesHelper Application (Apple, Inc. - installed 2017-12-06)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins:ⓘ

Silverlight: 5.1.50901.0 (installed 2016-11-21) [Lookup]

QuickTime Plugin: 7.7.3 (installed 2018-01-20)

CitrixICAClientPlugIn: 12.8.0 (installed 2017-12-16) [Lookup]

3rd Party Preference Panes:ⓘ

None

Time Machine:ⓘ

Time Machine not configured!

Top Processes by CPU:ⓘ

7%
WindowServer

6%
Google Chrome Helper

6%
Google Chrome

2%
kernel_task

1%
SafariNotificationAgent

Top Processes by Memory:ⓘ

701 MB kernel_task

293 MB Google Chrome Helper

173 MB Google Chrome

125 MB Arq Agent

117 MB mds_stores

Top Processes by Network Use:ⓘ

Input Output Process name

31 KB 7 KB mDNSResponder

10 KB 11 KB apsd

12 KB 1006 B netbiosd

1 KB 1 KB ntpd

0 B 64 B SystemUIServer

Top Processes by Energy Use:ⓘ

8.64 WindowServer

4.74 Google Chrome Helper

3.80 Google Chrome

0.40 hidd

Virtual Memory Information:ⓘ

8.98 GB
Available RAM

5.73 GB
Free RAM

3.02 GB
Used RAM

3.24 GB
Cached files

0 B Swap Used

Software installs (last 30 days):ⓘ

OneDrive: 17.3.7131 (installed 2017-12-25)

Install information may not be complete.

Diagnostics Events (last 3 days for minor events):ⓘ

2018-01-22 20:38:46 Last shutdown cause: 0 - Power loss

2018-01-22 20:35:50 Safari.app Hang [Open]

2018-01-21 20:45:03 update_dyld_shared_cache Crash [Open]

2018-01-21 20:34:15 iCloudPref.prefPane High CPU use [Open] [Details]

2018-01-21 09:10:27 com.apple.WebKit.WebContent High CPU use [Open] [Details]

2018-01-07 17:13:05 Kernel Panic [Open] [Details]

3rd Party Kernel Extensions: None