Q: Wifi is incredibly slow on OS X El Capitan

I can't answer your question but this is the speeds I get on WiFi with all my Apple devices…

I tried most everything here and no luck.  Finally re-set the SMC and my mini's wifi is firing again.  Huge download improvement and meaningful on upload per speedtest.  It's only been 12 hrs...we'll see if it holds up.  This is the article that pointed me in the right direction:  http://thenextweb.com/lifehacks/2010/12/04/how-when-why-to-reset-the-pram-smc-on -your-mac/#gref

For me, the fix for wifi and latency is to switch the router to 802.11g instead of 802.11ac or 802.11n. Basically, the macbook likes the setting immediate ACK and not delayed ACK in the router's advanced wireless configuration but consumer routers don't have access to these so just switch to 802.11g

You're kidding. I have a MacBook Pro at $ 2,500 dolars and I have to be disconnecting the wifi every ten minutes, wait one minute to work? Please be more serious and give a real solution.

Is some of apple "genius" reads this forum????? where is official explanation for that problem? For me it was working just fine, but than os x El ******** came... Now I can just stare at this pice of design engineering without using it... its getting worse and worse.. before i could restart the computer and it worked till it went a sleep... now this doesnt work anymore cos internet looses connectivity every 5 seconds...  Maybe I should hang it on the wall???

Problem with huge corporations is that they have their ways and means. It is true: Apple never had such a poor initial OS design, and where four updates canot solve one of the very important issues. Let's hope that 10.11.5 update will be posted soon. (I hoped that 3 and 4 will do the job to no avail.)

In the meantime, I followed what @Covejim did through SMC to improve the Internet blues on my Macbook Pro. I'm noticing speed improvement in browser reaction in loading an opening page, and even faster times to browse within a page. Furthermore and although I still have only 4GB RAM, now the fans are not turning on when I'm on Skype.

I have also being waiting for a solution since Yosemite, my Wi-Fi is so bad that I can't work with MBP (2014) and I have tried everything you can image. The real problem is a poorly implemented wi-fi driver, the driver has a bug on 802.11n. how I know that ? because I have been watching the Crash Logs for a while (months) and you can do it too (open Console.app and go to /Library/Logs/CrashReporter/CoreCapture/com.apple.driver.AirPort.Brcm4360.0/... ) and you will see your Wi-Fi listed there with a lot of logs showing the crashes.

I have finally solved the problem (yeah, right, not 100%, just a ugly hack), like someone already said I have disabled the 802.11n, staying only with 802.11g, and so far so good with not a single driver crash (and I am stress testing everything here). I am using the same router Airport Express with 802.11b/g enabled only, speed is great.

So Apple, we are already on El Capitan 10.11.4, c'mon... talk to Broadcom or do a good job implementing this protocol AND TEST IT BEFORE RELEASE!! OS X is starting to look like Windows! Gosh!

Important: if you go to a place that uses 802.11n you are out of luck, because the Mac will connect using (n), so just be patient for the wi-fi drops or use a Wi-Fi Dongle hehehe!!

Tip: To check for PHY Mode that will tell what you are using, just hold ALT (Option) and click the Wi-Fi icon, it is going to show a lot of information and one of them is PHY Mode that will list the type, 802.11n or 802.11g and etc.

Peace! (I am going to update if something happens)

This didnot help me. I am having wifi issues.

Hi,

I also previously encountered several wifi issues with OSX EL CAPITAN with 10.11.4.

( while downloading huge size files for example the connection drops, stops, also noticed poor network speed)

Using a internal Atheros 9280 chip ( AirPort Extreme) connected to a Linksys wifi access point router.

Upgrading to 10.11.5 seems to have solved them,  and all seems working fine for me now.

But perform a fresh backup first before updating.

Hope it helps,

I also update to 10.11.5.... But I have connectivity issue...

Hi All!

I have been having issues ever since buying my new Macbook, previously having a MBP on Yosemite. I never put 2 + 2 together, and have been blaming my ISP, who tonight finally (after various calls over last 6 weeks), pointed out it must by my MB, as the speediest on my iPhone was showing speeds of unto 160Mbps whereas my MB couldn't even load the speediest page, constantly dropping connection!

I have reset the PRAM and SMC, turned off my bluetooth, disabled the 'Wake for WIFI Access' and updated to 10.11.5, as all suggested!

The internet is now reaching the same speeds as my iPhone, and is currently not dropping. I will monitor over next couple of weeks and report back!

Sorry I don't know which of the above worked, but something (hopefully) has!

Thanks all,

D

My setup: MacBook Pro early 2011 - current AirPort Extreme - Synology Disk Station.

Network speeds: Yosmite roughly 37 MB up and down.

EL Cap: 10 MB up and down.

Is there any way to use Yosamite network drivers with El Captain?

Cheers

Thank you so much!!!!! This totally worked!!!!!

I think I may have figured this out, at least for me.

❯❯❯ ps -ajxww | grep location
_locationd      2876    1  2876      0    0 Ss    ??    0:00.08 /usr/libexec/locationd
❯❯❯ sudo kill -9 2876
Password:
❯❯❯

Fixes the problem every time. Lemme know if this works for anyone else.

Could you elaborate on this? What problem did you have? Dropouts or slow connection speeds. What are these terminal commands suppose to do?

Cheers

Robin