Connectivity issue using 10.11.3 (15D21)

I just installed OS X 10.11.3 today and lost connectivity and could not browse the internet. I am running ESET Security Pro for Mac.

Turning OFF ESET did not fix the problem but completely uninstalling ESET and rebooting did fix the problem and all runs normally now without ESET.

There is clearly a compatibility issue between ESET and OS X 10.11.3 -- your machine is effectively rendered unusable with 10.11.3 unless you completely uninstall ESET.

The uninstaller for ESET is located within the ESET package. You go to Finder, right click on ESET, and if you fish around in the subdirectories you will find the UNINSTALLER app. Uninstall ESET, reboot, and your problem will be fixed.

Uninstall followed by a Reinstall will not work. You need to uninstall it and leave it uninstalled.

1) Uninstall and leave it uninstalled

2) Reboot

3) Enable your original Apple Mac Firewall

Don't use ESET at all, leave it uninstalled.

That's the fix and it worked for me on two different Macs I have that were recently upgraded to 10.11.3

FYI, ESET have now been in touch with me. The acknowledge the problem and their developers are working to fix it with urgency.

They are also offering their impacted customers a FREE license extension to compensate them for the trouble.

I just got my 5+5 ESET license pack extended an extra year for FREE.

FYI: ESET emailed me about an hour ago (22 Jan 2016) and told me their developers have found the problem and are now putting a fix. There will be a new release shortly within a day or two that fixes this issue.

CBS News appears to be loading fine for me in Safari from my OS X 10.11.3 Macbook Pro.

http://www.cbsnews.com

New York Times seems to come up just fine

http://www.nytimes.com

Are these the URLs?

Do you have example URLs that are not loading?

All websites work for me.

For clarification, Mac's don't run iOS...

The long term forum helpers advise against 3rd party anti-virus, Mac cleaners, and memory cleaner apps, as they are often more harmful than any benefit they claim to provide. We have seen lots of performance issues because of this class of apps. We have seen kernel panics because of this class of apps. We have seen excessive memory usage because of this class of apps.

How does Mac OS X protect me?

<http://www.thesafemac.com/mmg-builtin/>

Apparently yes.

Take another look at "Latest El Capitan update a bust" where the OP reports that uninstalling ESET fixed the problem for him.

Here are my thoughts as to why that I posted to that thread:

I do not run ESET, but I do wonder if pulling it from the start-up list is enough to disable it.

It may have kernel modules or another start-up mechanism to initialize itself early in Mac OS boot.

In other words, maybe uninstalling ESET is the only way to actually disable it. Just a thought as a last resort.

Better check the topic Re: Latest El Capitan update a bust again, because uninstalling Eset DID the trick. That's the problem with apps like these: they install all kinds of cr@p on your M@c. 😉

Same here:

Updated to OS X 10.11.3 (this morning) and most recent version of ESET Cyber Security Pro.

Browsing got worse and worse until become not useable anymore.

Spent all day troubleshooting my network infrastructure. Everything worked fine except my personal updated macbook pro. All other server and clients (several different OS ecosystems) worked fine.

I was already considering downgrading to Yosemite but did one last google search before that, for peace of mind.

Speckta, thank you for your help: uninstalled ESET and everything is working fine now. Going to contact ESET support.

Last couple of years, I'm sick of spend time solving problems after almost every OS X update. Every time that happens, I consider definitely change to Linux more and more.

(By the way, Apple Mail issues still expecting to be solved.)

Speckta,

Theoretically, quitting ESET or removing it from launch at start up doesn't solve the problem because it still runs in background.

(please NOTE: I didn't trie it in this particular situation but it is my experience with this software in similar situations.)

thanks!, didn't even think of Eset, had to re download the dmg to run the uninstaller, but once done, Boom, full power again capitan' lol