Safari is not showing images at random on Tumblr. (image inside)

Thanks for the help Eric, sadly none of these solve the problem. With a little help of the developer menu I have narrowed the issue down to a .js file that Tumblr uses:

In this case it took 1:08 minutes to load and I've seen it up to 5:30 minutes. I tried making a new user-account on my iMac to test if it had anything to do with the user setting but on a fresh account the problem appears as well.

It also is an issue on Chrome so it might be macOS Sierra related? Would I need to reinstall?

This didn't help either, the problem stays when I boot in safe mode. As well as the other browsers.

I have no idea how to solve this other than to try a clean install but I'm somewhat scared it'll remain.

In safe mode it also happens.

I got so frustrated I did a reinstall of my macOS by hitting CMD + R when booting and clicking "Reinstall macOS Sierra" this way my data was saved and if macOS was broken it would be fixed. After about 30 minutes of reinstalling it went well for 5 to 10 minutes but the same issues started appearing again.

After that I tried disabling all Safari extensions like you said (heck I even deleted them, I only had OnePassword and an Adblock). Same thing happened.. it went well for 5 to 10 minutes before the issues reappeared. I also appears on Chrome and Firefox.

It is specifically Tumblr and the crash always look like this:

If it's related to Tumblr why am I the only one experiencing this? 😟 It frustrates me greatly.

Thanks for your help Eric, I do really appreciate it. My iMac has one account (my account) and I'm the only user.

At the moment of doing this EtreCheck I was watching some Youtube. I hope this is of any help to you or anyone who is reading this. I will paste the log down here.

EtreCheck version: 3.0.6 (315)

Report generated 2016-10-10 20:56:45

Download EtreCheck from https://etrecheck.com

Runtime 1:24

Performance: Excellent

Click the [Support] links for help with non-Apple products.

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

Problem: Other problem

Hardware Information: ⓘ

iMac (27-inch, Late 2013)

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

iMac - model: iMac14,2

1 3,4 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

BANK 0/DIMM1

Empty

BANK 1/DIMM1

Empty

Bluetooth: Good - Handoff/Airdrop2 supported

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

Video Information: ⓘ

NVIDIA GeForce GTX 780M - VRAM: 4096 MB

iMac 2560 x 1440

System Software: ⓘ

macOS Sierra 10.12 (16A323) - Time since boot: about 6 hours

Disk Information: ⓘ

Samsung SSD 850 EVO 1TB disk0 : (1 TB) (Solid State - TRIM: Yes)

EFI (disk0s1) <not mounted> : 210 MB

Macintosh SSD (disk0s2) / [Startup]: 999.21 GB (361.04 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

USB Information: ⓘ

asmedia Swift Case PRO USB 3.0

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime HD Camera (Built-in)

Apple Inc. iPhone

Logitech USB Laser Mouse

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

Mac App Store and identified developers

Kernel Extensions: ⓘ

/Applications/duet.app

[loaded] com.kairos.driver.DuetDisplay (2.0.0 - SDK 10.11 - 2016-09-21) [Support]

System Launch Agents: ⓘ

[not loaded] 7 Apple tasks

[loaded] 163 Apple tasks

[running] 101 Apple tasks

System Launch Daemons: ⓘ

[not loaded] 39 Apple tasks

[loaded] 160 Apple tasks

[running] 104 Apple tasks

Launch Agents: ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (2014-11-25) [Support]

[loaded] com.oracle.java.Java-Updater.plist (2014-11-25) [Support]

Launch Daemons: ⓘ

[loaded] com.adobe.SwitchBoard.plist (2014-11-25) [Support]

[loaded] com.apple.installer.osmessagetracing.plist (2016-09-14)

[loaded] com.oracle.java.Helper-Tool.plist (2014-11-25) [Support]

User Launch Agents: ⓘ

[loaded] com.google.keystone.agent.plist (2016-07-12) [Support]

[loaded] com.valvesoftware.steamclean.plist (2016-10-10) [Support]

User Login Items: ⓘ

Window Tidy Programma (/Applications/Window Tidy.app)

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

stack Programma (/Applications/stack.app)

Air Video Server HD Programma (/Applications/Air Video Server HD.app)

Internet Plug-ins: ⓘ

Silverlight: 5.1.50428.0 - SDK 10.6 (2016-07-09) [Support]

QuickTime Plugin: 7.7.3 (2016-09-14)

AdobeExManDetect: AdobeExManDetect 1.1.0.0 - SDK 10.7 (2014-11-25) [Support]

JavaAppletPlugin: Java 8 Update 101 build 13 (2016-08-04) Check version

Safari Extensions: ⓘ

1Password - AgileBits - https://agilebits.com/onepassword (2016-10-10)

Adblock Plus - Eyeo GmbH - https://adblockplus.org/ (2016-10-10)

3rd Party Preference Panes: ⓘ

Java (2016-08-04) [Support]

Time Machine: ⓘ

Skip System Files: NO

Mobile backups: OFF

Auto backup: YES

Volumes being backed up:

Macintosh SSD: Disk size: 999.21 GB Disk used: 638.17 GB

Destinations:

Externe HD [Local]

Total size: 999.35 GB

Total number of backups: 38

Oldest backup: 04-08-16 03:31

Last backup: 10-10-16 15:37

Size of backup disk: Too small

Backup size 999.35 GB < (Disk used 638.17 GB X 3)

Top Processes by CPU: ⓘ

4% WindowServer

2% fontd

1% kernel_task

1% ionodecache

0% com.apple.AmbientDisplayAgent

Top Processes by Memory: ⓘ

2.82 GB com.apple.WebKit.WebContent(11)

1.23 GB kernel_task

623 MB Safari

393 MB WindowServer

246 MB mdworker(6)

Virtual Memory Information: ⓘ

433 MB Free RAM

16.00 GB Used RAM (6.96 GB Cached)

62 MB Swap Used

Diagnostics Information: ⓘ

Oct 10, 2016, 02:50:36 PM Self test - passed

It seemed to help for a while but that is not a solution either. I have NO IDEA what's causing this. I made a little video of my timeline to demonstrate: https://youtu.be/E1H1pvm9Bbc

So far I have:

• deleted all history
• "repaired" my macOS installation
• deleted all extensions
• disabled all extensions
• disabled all plugins

EtreCheck, as recommended by EricRoot, didn't seem to have any alerting issues.. It seems to appear less frequently now but it still happens as the video demonstrates. Will it be solved if I wipe my hard disk and reinstall everything? Not really looking forward doing that.

Nope nope nope 😟 😟 Didn't work either. I waited a few days for the Sierra update and even after the update its still not working.

Read somewhere to flush my DNS so I tried that and that didn't work. I did get two error reports on webkit last week but i can't find how to reinstall it.

This is annoying me to bits and I've noticed it is on some other image heavy sites as well but less frequently. Should I reinstall my mac?

Yes I tried a guest account before. With the guide I created an admin account, logged in, (immediately changed the mouse speed 😠), first thing I did was open Safari, go to Tumblr.com and log in. Within 30 seconds some of the images wouldn't load anymore. If I'm correct this would verify this is a system wide problem?

I thought I was able to recreate this issue op Chrome as well but I fail to do so this morning. Seems to work flawlessly for the last two hours.

On a related note: Safari has become "unbearably" slow since the update yesterday. Not the loading speed but things like hover-over effects on buttons and such, even after I rebooted. (Youtube, Facebook, Flickr...) No strange CPU usage.

Was able to recreate on Chrome! After 6 minutes of waiting the images started loading..