Flickering horizontal line when I click on Reading List

1. CleanMyMac might be sh&t but it isn't the problem. Uninstalled. Problem still exists

2. As I said to Eric Root, I don't have Cocktail installed.

3. Uninstalled. Problem still exists

4. Yes, I use it a lot actually.

Thanks for your post.

Just reinstalled Macosx, problem still exists. Must be a hardware problem.....

Hi Eric,

Thanks for your reply. I setted up another user account and also tried booting up in safe mode, and the flickering problem still remains.

Below is the output from Etrecheck when booted normally:

EtreCheck version: 4.2.1 (4C020)

Report generated: 2018-04-27 00:30:15

Download EtreCheck from https://etrecheck.com

Runtime: 4:60

Performance: Good

Problem: Other problem

Major Issues: None

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Time Machine auto backup disabled- Time Machine auto backups are disabled.

Apps crashing- There have been numerous app crashes.

Small backup drive- Time Machine backup drive is too small.

Unsigned files- There is unsigned software installed. They appear to be legitimate but should be reviewed.

32-bit Apps- This machine has 32-bits apps that may have problems in the future.

Hardware Information:

iMac (Retina 5K, 27-inch, Late 2015)

iMac Model: iMac17,1

1 4 GHz Intel Core i7 (i7-6700K) CPU: 4-core

32 GB RAMAt maximum

BANK 0/DIMM0 - 8 GB DDR3 1867 ok

BANK 0/DIMM1 - 8 GB DDR3 1867 ok

BANK 1/DIMM0 - 8 GB DDR3 1867 ok

BANK 1/DIMM1 - 8 GB DDR3 1867 ok

Video Information:

AMD Radeon R9 M395 - VRAM: 2048 MB

iMac

Drives:

disk0 - APPLE HDD ST3000DM001 3.00 TB (Mechanical)

Internal SATA 6 Gigabit Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 () [Core Storage Container] 3.00 TB

disk2 - Macintosh HD (Journaled HFS+) [Fusion Drive] 3.11 TB

disk0s3 - Recovery HD () [Recovery] 650 MB

disk1 - APPLE SSD SM0128G 121.33 GB (Solid State - TRIM: Yes)

Internal PCI 8.0 GT/s x4 Serial ATA

disk1s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk1s2 () [Core Storage Container] 120.99 GB

disk2 - Macintosh HD (Journaled HFS+) [Fusion Drive] 3.11 TB

disk1s3 - B*******X () [Recovery] 134 MB

Mounted Volumes:

disk2 - Macintosh HD [Fusion Drive] 3.11 TB (965.00 GB free)

Journaled HFS+

Mount point: /

Network:

Interface en0: Ethernet

One IPv4 address

Interface en6: iPad

Interface en1: Wi-Fi

802.11 a/b/g/n/ac

One IPv4 address

Interface en5: iPhone

Interface en4: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

iCloud Quota: 1.76 TB available

System Software:

macOS High Sierra 10.13.4 (17E202)

Time since boot: Less than an hour

System Load: 2.61 (1 min ago) 1.56 (5 min ago) 0.68 (15 min ago)

Security:

Unsigned Files:

Launchd: /Library/LaunchDaemons/com.datarobotics.ddserviced.plist

Executable: /Library/Application Support/Data Robotics/Drobo Dashboard/DDServiced

Details: Exact match found in the whitelist - probably OK

32-bit Applications:

40 32-bit apps

Kernel Extensions:

/Applications/Parallels Desktop.app

[Not Loaded] prl_hypervisor.kext (Parallels, Inc., 12.2.1 41615 - SDK 10.9)

[Not Loaded] prl_netbridge.kext (Parallels, Inc., 12.2.1 41615 - SDK 10.9)

[Not Loaded] prl_usb_connect.kext (Parallels, Inc., 12.2.1 41615 - SDK 10.9)

[Not Loaded] prl_vnic.kext (Parallels, Inc., 12.2.1 41615 - SDK 10.9)

/Applications/duet.app

[Loaded] DuetDisplay.kext (Rahul Dewan, 2.0.0 - SDK 10.12)

/Library/Extensions

[Not Loaded] TrustedDataSCSIDriver.kext (Drobo, Inc., 1.8.0 - SDK 10.10)

[Not Loaded] DroboTBT.kext (Drobo, Inc., 1.2 - SDK 10.10)

[Loaded] MB_MBAM_Protection.kext (Malwarebytes Corporation, 3.2 - SDK 10.13)

/System/Library/Extensions

[Not Loaded] LaCieScsiType00.kext (1.9.1 - SDK 10.5)

/Users/***/Downloads/Little Snitch/Little Snitch Installer.app

[Not Loaded] LittleSnitch.kext (4.0.3 - SDK 10.11)

System Launch Agents:

System Launch Daemons:

Launch Agents:

Launch Daemons:

User Launch Agents:

User Login Items:

Dropbox Application (Dropbox, Inc.

(/Applications/Dropbox.app)

CheatSheet Application (Stefan Fuerst

(/Applications/CheatSheet.app)

Mailbutler Application (Mailbutler GmbH

(/Applications/Mailbutler.app)

HyperDock Helper Application (Mac App Store - installed 2017-03-08)

(/Applications/HyperDock.app/Contents/Library/LoginItems/HyperDock Helper.app)

PopClip Application (Mac App Store

(/Applications/PopClip.app)

iMazing Mini Application (DigiDNA SARL - installed 2017-12-10)

(/Applications/iMazing 2.app/Contents/MacOS/iMazing Mini.app)

CleanMyMac 3 Menu Application (MacPaw Inc. - installed 2018-04-13)

(/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app)

HazelHelper Application (Noodlesoft, LLC

(/Users/***/Library/PreferencePanes/Hazel.prefPane/Contents/MacOS/HazelHelper.ap p)

DDAssist Application (Drobo, Inc.

(/Applications/Drobo Dashboard.app/Contents/Resources/DDAssist.app)

BetterSnapTool Application (Mac App Store

(/Applications/BetterSnapTool.app)

Alfred 3 Application (Running with Crayons Ltd

(/Applications/Alfred 3.app)

HyperSwitch Application (Christian Baumgart

(/Applications/HyperSwitch.app)

Default Folder X Application (?

(/Applications/Default Folder X.app)

TotalFinder Application (BinaryAge Limited

(/Applications/TotalFinder.app)

Bartender 3 Application (Surtees Studios Limited

(/Applications/Bartender 3.app)

BetterTouchTool Application (Andreas Hegenberg

(/Applications/BetterTouchTool.app)

CIJSULAgent SMLoginItem (Canon Inc. - installed 2018-03-03)

(/Applications/Canon Utilities/IJ Scan Utility/Canon IJ Scan Utility Lite.app/Contents/Library/LoginItems/CIJSULAgent.app)

Screens Connect Launcher SMLoginItem (Edovia Inc. - installed 2018-04-14)

(/Applications/Screens Connect.app/Contents/Library/LoginItems/Screens Connect Launcher.app)

1Password mini SMLoginItem (Mac App Store - installed 2018-03-31)

(/Applications/1Password.app/Contents/Library/LoginItems/2BUA8C4S2C.com.agilebit s.onepassword-osx-helper.app)

Irvue Launch Helper SMLoginItem (Mac App Store - installed 2018-02-13)

(/Applications/Irvue.app/Contents/Library/LoginItems/Irvue Launch Helper.app)

VOXAgent SMLoginItem (Mac App Store - installed 2018-03-03)

(/Applications/VOX.app/Contents/Library/LoginItems/VOXAgent.app)

Loop SMLoginItem (Mac App Store - installed 2018-03-03)

(/Applications/VOX.app/Contents/Library/LoginItems/Loop.app)

Deliveries Express SMLoginItem (Mac App Store - installed 2017-10-24)

(/Applications/Deliveries.app/Contents/Library/LoginItems/Deliveries Express.app)

Internet Plug-ins:

FlashPlayer-10.6: 29.0.0.140 (installed 2018-04-14)

Flash Player: 29.0.0.140 (installed 2018-04-14)

QuickTime Plugin: 7.7.3 (installed 2018-03-30)

AdobeAAMDetect: 3.0.0.0 (installed 2018-02-26)

Audio Plug-ins:

BartenderAudioPlugIn: 1.0.0 (installed 2016-09-14)

Safari Extensions:

3rd Party Preference Panes:

Backblaze Backup (installed 2018-03-31)

Flash Player (installed 2018-03-27)

Hazel (installed 2018-03-31)

VOX Preferences (installed 2017-04-03)

Time Machine:

Skip System Files: No

Mobile backups: No

Auto backup: No

Volumes being backed up:

Macintosh HD: Disk size: 3.11 TB - Disk used: 2.15 TB

Destinations:

P*************************u [Network] (Last used)

Total size: 2.00 TB

Total number of backups: 16

Oldest backup: 2018-04-08 00:21:08

Last backup: 2018-04-25 05:55:46

Top Processes by CPU:

Top Processes by Memory:

Top Processes by Network Use:

Top Processes by Energy Use:

Virtual Memory Information:

Clean up:

de.the-skylab.episodes -

Diagnostics Information (past 7 days):

2018-04-27 00:23:19 Last Shutdown Cause: 0 - Power loss (once)

2018-04-27 00:16:46 TotalFinder.app Crash (5 times)

2018-04-26 19:00:46 Transmission.app CPU (once)

2018-04-26 18:44:21 com.apple.WebKit.WebContent Crash (once)

End of report

Thanks for your reply.

1. Status Bar switched off.

2. Turned off all extensions. Restarted Safari. With all extensions switched off, problem still existed.

3. Have used CleanMyMac for well over 2 years and never had this problem.

4. Never had Cocktail installed.

Any other suggestions. Still strange that only Safari has this problem.

Thanks.

Yes, I did remove languages using CMM, but this was done a long time ago. I've reset SMC and NVRAM twice but no joy.

Still trying to work out what has kicked this off suddenly........GPU? Display? Installed something I shouldn't have?

I am wondering whether I should just do a clean install and be done with it? Although it's going to be pain!!

Hi Lexiepex,

Thanks again.

True. I don't know if the issue is caused by CMM. I am just guessing as I've never had problems before with my iMac.

I've deleted all login items and unfortunately the issue is still there with the line coming up for about a nanosecond when I click on the reading list in Safari. The line comes up in the exact same location on my screen but only in Safari and only when I click on the reading list.

When I open a link from reading list by just clicking, the problem is recreated. When I right-click and then click "open in new tab" or "open in new window", there is never a problem.

This is really strange......