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Wifi Slow/Unresponsive since El Capitan 10.11.3

Wireless is extremely slow since updating to El Capitan 10.11.3. Macbook Pro Mid 2014. I can plug in thunderbolt ethernet adapter and internet speeds are excellent. Wireless was great with El Capitan 10.11.2, just updated to 10.11.3 this morning and have been struggling with wireless since. I also had wireless problems with Yosemite. Cell phone, windows laptop, parallels windows 7 & 10 installs on macbook all work great on wifi network. Anyone have suggestions to improve wireless speeds? This is just not in safari, all browsers (chrome and firefox), other apps such as spotify and maps as well. I am very tech savvy and have tried all of the basis... reboot router, delete wifi network/add again, change dns servers, clear dns, clear safari temp files, etc.

MacBook Pro with Retina display, OS X El Capitan (10.11.3)

Posted on Jan 20, 2016 2:51 PM

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Posted on Jan 21, 2016 6:48 AM

Please start up in Recovery mode. In the OS X Utilities screen, select Get Help Online. A clean copy of Safari will launch. No plugins, such as Flash, will be available. While in Recovery, you'll have no access to your saved bookmarks or passwords, so make a note of those before you begin, if they're needed for the test.

Test. After testing, restart as usual and post the results.

26 replies

Jan 22, 2016 3:35 AM in response to yeovilpen

i must say this is great offer by eset

however they really ****** me off. It's not because of the fact that something is messed up. This is a fact of life. **** happens and I can understand that we're dealing with hard and software. Things can go wron. No problem


they peed me off because they didnt bother to email their customers that this problem may affect some users. Not all but some.

THey could have have scored extra kudos by offering a solution. Instead they chose not to communicate and let their paying customers find a solution by themselves. This, to me, is bad for any company. Sweeping such an issue under the rug ain't going to solve anything. It will however **** their paying customers off. I for one spent the whole day yesterday trying to find the issue. As an owner of my own company this has cost me money and a waste of my time.


all because eset decided not to communicate with their customer.

Jan 22, 2016 4:19 AM in response to NL_SCOTT

I agree


I spent a whole day. I was just about to start restoring a pre-upgrade version of my system from TimeMachine. I even worried that it was my brand new, highly spec'd and very expensive MacPro that was the problem (given none pf my other macs were an issue).


Very glad I found this thread. I wonder how many other users are struggling now with this known issue. I really do think ESET should be contacting people.

Jan 22, 2016 8:25 AM in response to NotJasonBourne

I uninstalled ESET and have Bitdefender now. I ran a test and it found 5 Trojans in the archive folder I never used for the last 4 years. I tested this folder with the " award winner" before and it found nothing. My computer is flying now. What's the difference, I tried to contact ESET for the refund, but the hold is terrible. Usually I don't put any labels, but now I want to say now "losers!!!" They now have a note on their front-page about the issue now.


I do understand every company can have problems, but this is for we have emails.

Jan 22, 2016 8:52 AM in response to NL_SCOTT

NL_SCOTT wrote:


That's not entirly true dude


also I used it for traffic filtering and phishing mails

OSx used to be less the spotlight in terms of hacking and so on.

Lately there's more hacks and exploits. Nothing can be completely virus free

I'm not going to argue with you. There is no need for third party ant virus apps which may also cause issues. If you choose to waste system resources and possibly create problems that is up to you. Go for it. Good luck.

Feb 2, 2016 6:03 PM in response to benjose33

I have had the same problem but I have Sofos anti-virus installed. Very time my MacAir goes to sleep it takes an age to train back onto my home wifi network. I keep on having to select which network it has to use even though home network is top of my listed networks. If this is antivirus related then it's not just the ESET having the issue - perhaps it's a bit unfair to pummel them if it is a wider issue. Has anyone found a solution for other anti-virus's ??

Wifi Slow/Unresponsive since El Capitan 10.11.3

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