No internet after update 2016-001

Any issues using the ethernet?

OSX Yosemite Wifi issues

I have the very same problem. Since this update has been installed, I can't see news website, bank website, usual website. It look like as soon there is some javascript, the internet freeze... This behavior appeared at the minute I rebooted the computer. Whatever the connection is (wifi or cable ethernet) the browser is really slow. I use Chrome and I did some test on Safari and Firefox. Every time the same problem occur.

What is inside this security update? There is no info and the computer don't browse on internet correctly.

Try the suggestions in the link I posted. I have to warn you that the wifi thread is very long. So get comfortable.

Click on the link, read the info. Afterwards if you have not found a solution post your own topic with details of your system information. You are threadjacking this post.

I lost also access to a bank site after security update. When I log in I cannot access a page. Same with Safari and Firefox.

Addition: Actually it takes minutes to open a page.

It seems that pages that have live data update does not work properly any more with OS X.

It appears I have the same problem. Details provided below...

Immediately after installing two updates (i.e., Security Update 2016-001 and iMovie version 10.1.1) on my Macbook Pro (OS X Yosemite, version 10.10.5), many websites (e.g., amazon.com, cnn.com, sephora.com, redbox.com, washingtonpost.com, ...) either failed to resolve at all or--after lengthy (2-5 minute) delays--failed to load all images/content. Oddly, some websites (i.e., yahoo.com and youtube.com) experience no performance issues/delays at all. Issue occurs in both Google Chrome (Version 48.0.2564.82 (64-bit)) and Safari (Version 9.0.3 (10601.4.4)). Internet (Verizon FiOS) is working perfectly for Windows based machines. Macbook is hard wired via thunderbolt.

The issue did not occur when the computer was in Safe Boot.

A review of 2016-001 release notes appears to indicate that the only OS X Yosemite v10.10.5 component was an update to: libxslt. Specifically:

libxslt

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 to v10.11.2

Impact: Visiting a maliciously crafted website may lead to arbitrary code execution

Description: A type confusion issue existed in libxslt. This issue was addressed through improved memory handling.

After 2+ hours on the phone with Apple Support, they suspect ESET. I do not. The issue continues to occur even when the following ESET settings were disabled: Network Traffic Filtering; Web Access Protection; Email Client Protection; and Anti-Phishing Protection.

Update: Issue resolved.

I uninstalled* ESET Cyber Security Pro, restarted, and then re-installed ESET. Now, my browsers (Safari and Chrome) function normally on all websites. Root cause unclear, but I suspect the libxslt modifications in 2016-001 played a non trivial role. {Thanks to Apple Support for the troubleshooting help}

*Via Activity Monitor, stopped the ESET processes (i.e., highlight, View->Quit Process). Via Finder, deleted ESET entries from both the Applications and Downloads folders. Emptied Trash.

I have Eset too. Thanks for the information, I will try it tonight.

This is exactly the good answer. I did the same steps and everything got back to normal. Apparently, ESET affects OSX after installing the security update. Many thanks for the procedure. This thread shall help other people I guess.

-> CMCSK:

Your last comment to me was so helpful, thank you for your support. This is not called "help" to tell people they are threadjacking.

Update: ESET uninstall/restart/reinstall is only a temporary fix. To permanently fix, proxy firewall settings need to be adjusted manually by ESET Support, or users need to wait for a to-be-released ESET SW update.

After approximately 5 hours, the website-access issue resurfaced in both browsers. Consequently, I contacted ESET Support. Per ESET Support, Security Update 2016-001 included operating system changes that were *not* publicized to vendors. As a result, the 2016-001 changes are not compatible with legacy proxy firewall settings. ESET developers are working on a software fix (release time/date not provided). In the meantime, the only way to resolve (and keep ESET installed) is via a free ESET support session. During the ~5min session, the ESET agent will request screen-sharing access, change the proxy firewall settings *manually* (and out of view), and then ask the user to restart. At that time, the issue is fixed.

See alert5781 on ESET Support’s website for details. Be advised, the live support session is currently available Monday-Friday from 5 a.m. – 7 p.m. PST.

http://support.eset.com/alert5781/

I have this issue after update 2016-001 - slow or no loading for some internet sites. I don't have ESET installed on my computer. One post suggests looking at the chain of posts that were used to resolve internet problems after installing Yosemite. None of those seem to apply to me. I've had no problems until 2016-001. Very frustrating. Any fixes that work?