grahammiranda
Level 1 (15 points)
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Q: Wifi is incredibly slow on OS X El Capitan

So after installing OS X El Capitan my Wi-Fi is so so so so so slow.

 

My Internet Connection Speed is 2Mbps (240kb/sec) and it shows 2Mbps on my iPad and iPhone (using the speedtest.net app). On my MacBook Pro it shows me 120-250Kbps (10 to 25kb/sec) when I'm using Spotify, YouTube and anything that's Internet based (Apple Forums took me a minute to open)

 

I've never ever had this problem on Yosemite. My wifi works fine for sure. Even during downloading OS X El Capital from the App Store my speed was constant 230-240 Kb/sec but after installing El Capitan nothing works fine (Internet Based Applications)

 

I did everything I could. Deleted Wifi AP Name and added it back. Restarted everything (Router and Mac). Turned off Wifi and turned it back on.

 

I don't think its my wifi router or anything or else fault as my iPad and iPhone would have been affected as well.

 

Can someone please tell me if they face this issue as well and if yes what's the solution?

MacBook Pro (Retina, 15-inch, Late 2013), OS X El Capitan (10.11)

Posted on Oct 4, 2015 5:16 AM

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grahammiranda

Q: Wifi is incredibly slow on OS X El Capitan

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  • by grahammiranda,

    grahammiranda grahammiranda Oct 21, 2015 3:52 PM in response to jpac
    Level 1 (15 points)
    Apple Watch
    Oct 21, 2015 3:52 PM in response to jpac

    Did 10.11.1 Fix any Problems for anyone??? I'm too scared to update lol. IT make make it so worse that wifi would disappear completely! lol

  • by Anonymous Art,

    Anonymous Art Anonymous Art Oct 21, 2015 6:30 PM in response to dominic23
    Level 1 (0 points)
    Oct 21, 2015 6:30 PM in response to dominic23

    Hi. I did the above which seems to have messed with my email. It's all gone, settings not working. And safari still not any faster. Help!

  • by RadarAlpha,

    RadarAlpha RadarAlpha Oct 22, 2015 6:52 AM in response to grahammiranda
    Level 1 (0 points)
    Oct 22, 2015 6:52 AM in response to grahammiranda

    Hi Graham,

     

    FYI I did a full disk format and recovery of 10.11 then took the upgrade to 10.11.1 on the Mac Mini that I stupidly upgraded to El Capitan.  (The other MM Server is still on Yosemite.)  To my relief this fixed the wifi issue and other performance issues evidenced by beach balls everywhere from Preview, Mail, Safari, ...... etc.

     

    But 10.11.1 broke compatibility with my Canon printer.  Now neither Canon nor Fuji Xerox printers work.  Apple don't seem to care about compatibility with other manufacturers products when they release upgrades.  Every year since I switched to Mac I lose one printer or another for a couple of months while the manufacturer plays catchup with upgrades.  El Capitan seems to have done them both in.  Fuji Xerox announced they don't expect to release a new driver to fix Apple until Dec.

     

    It a wondrous thing that Apple has to continuously write/update code that affects something as low level and generic as a printer driver or wifi.  It makes one wonder if the guts of OS X look like spaghetti.

     

    So its a good thing my "crappy" $300 ASUS eePC with Windows 10 is so damned fast and reliable!  No printer issues there.... (FYI another person on this forum called the ASUS crappy)

     

    Good luck for your upgrade.

  • by mikehash,

    mikehash mikehash Oct 22, 2015 3:54 PM in response to grahammiranda
    Level 1 (0 points)
    Oct 22, 2015 3:54 PM in response to grahammiranda

    I've had the same issue with terribly slow wifi with a Macbook Air 2014 and a Macbook pro 2015.

    The issue was so bad, that not even my local virtual box server loaded a website I'm developing and testing on it, a single load took over 30 seconds when the issue was affecting my MBP, after the fix, it's loading instantly, and so is every website, my rates on speedtest.net are perfect and in accordance to what my ISP is providing me with.

     

    I tried several possible fixes, but what did the trick was the following:

     

    1. Disable bluetooth
    2. Open network preferences and delete every connection, once done, create a wifi connection.
    3. Set DNS manually to openDNS
    4. Disabled Wake for wifi on power settings

    After doing this, I've been running perfectly on both laptops for over 4 hours now. I hope this helps others as this is definitely a bug in the network stack on El Capitan and Apple needs to pay attention to this ASAP, not emojis...

  • by safarionwin,

    safarionwin safarionwin Oct 22, 2015 4:10 PM in response to RadarAlpha
    Level 1 (16 points)
    Apple Watch
    Oct 22, 2015 4:10 PM in response to RadarAlpha

    sorry to hear that happened to you, I upgraded to 10.11.1 and all my printers including my Canon and my Zebra are working fine.

  • by mikehash,

    mikehash mikehash Oct 22, 2015 4:26 PM in response to safarionwin
    Level 1 (0 points)
    Oct 22, 2015 4:26 PM in response to safarionwin

    What about your wifi?

  • by safarionwin,

    safarionwin safarionwin Oct 22, 2015 5:00 PM in response to mikehash
    Level 1 (16 points)
    Apple Watch
    Oct 22, 2015 5:00 PM in response to mikehash

    My wifi seems the same as before updating to 10.11.1.  Basically fine.  What really helped my wifi was resetting my airport extreme to factory settings, unplugging airport extreme, unplugging cable modem for 1/2 hour, replugging cable modem, restarting airport extreme and reconfiguring as new.  Now my biggest complaint is that my macbook wifi seems to vary between either 80mbs or 300+ mbs download and I don't understand why it defaults down to the 80 most of the time when it is apparently capable of 300+.

  • by jpac,

    jpac jpac Oct 22, 2015 10:40 PM in response to grahammiranda
    Level 1 (8 points)
    Oct 22, 2015 10:40 PM in response to grahammiranda

    Also noticed when opening the Airport Utility the wireless RADIO settings changed

    FROM:

    802.11n only (5GHz) -- 802.11n only (2.4GHz)   

    TO

    802.11n (5GHz) -- 802.11n (2.4GHz)  AUTOMATIC

     

    I put them back to  802.11n ONLY and this seems to fix the speed problem... 

     

    If you don't see these options in the RADIO menu do Option(Alt)-Click on te Radio menu.

  • by mikehash,

    mikehash mikehash Oct 23, 2015 9:03 AM in response to grahammiranda
    Level 1 (0 points)
    Oct 23, 2015 9:03 AM in response to grahammiranda

    After testing on both laptops, I'm getting much better results on 10.11.1, the MBA has 10.11 and even with the fix I posted, wifi drops from time to time, however, it's faster than before.

  • by robinfromköln,

    robinfromköln robinfromköln Oct 25, 2015 7:22 AM in response to grahammiranda
    Level 1 (4 points)
    Oct 25, 2015 7:22 AM in response to grahammiranda

    I have 15 inch MacBook Pro Early 2011 which is connected to a Air Port Express. The Air Port Express is connected via LAN to a Synology DiskStation. With Yosemite I'm getting transfer speed around 11 MB/s (thanks to the VERY fast  Air Port Express LAN port). On El Cap it's not even 7 MB/s which makes it too slow for Time Machine Backups. I did a PRAM reset which did not help either. Any suggestions?

  • by jpac,

    jpac jpac Oct 27, 2015 1:08 AM in response to jpac
    Level 1 (8 points)
    Oct 27, 2015 1:08 AM in response to jpac

    Found this link very useful to diagnose the problem.

     

    http://osxdaily.com/2012/07/31/wi-fi-scanner-mac-os-x-mountain-lion/

     

    Using advanced options in he wifi Menu

  • by navcop82,

    navcop82 navcop82 Oct 27, 2015 1:02 PM in response to jubamad
    Level 1 (0 points)
    Oct 27, 2015 1:02 PM in response to jubamad

    Resetting PRAM helped me too, thank you jubamad! Went from 1.2, to 19-21! Hopefully it sticks.

  • by Goldbek,

    Goldbek Goldbek Oct 28, 2015 2:14 PM in response to grahammiranda
    Level 1 (4 points)
    Oct 28, 2015 2:14 PM in response to grahammiranda

    I'm really annoyed by this.

     

    Just updated to OS X 10.11.1 and have again terribly slow wifi on my MBA. Any other devices run fast on my wifi.

     

    All these updates and bugs make me think of going back to windows...

  • by redrox,

    redrox redrox Oct 29, 2015 10:54 AM in response to Goldbek
    Level 1 (1 points)
    Oct 29, 2015 10:54 AM in response to Goldbek

    Yes, same problem here, as well as my wife's computer. Way extremely slow. So, I tried one of the easier fixes described earlier, that being turning off Wifi, then back on after a short rest. For me at least, that did it -- if nothing degrades and this speed is more or less constant, I'll take it -- I think. I have only tried three or four sites I often go to... fingers crossed that it continues to perform at this speed. 

  • by robinfromköln,

    robinfromköln robinfromköln Oct 29, 2015 11:58 PM in response to robinfromköln
    Level 1 (4 points)
    Oct 29, 2015 11:58 PM in response to robinfromköln

    Maybe 10.11.2 will help. Found this on macrumors.com:

    Apple's release notes for the first developer beta asked testers to focus on Graphics, Wi-Fi, Calendar, USB, Notes, Photos, and Spotlight.


    till then I'll stick to Yosemite .....


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