Slow WiFi in Sierra

Discussion in 'macOS Sierra (10.12)' started by yg17, Oct 12, 2016.

  1. yg17 macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #1
    Let's play a little game I like to call "One of these things is not like the other"

    Windows 7 Laptop:
    [​IMG]

    iPhone 6S Plus:
    [​IMG]

    iPad Air 2:
    [​IMG]

    2015 15" rMBP:
    [​IMG]

    Were you able to figure out which one is not like the others? You did, congratulations! You win, but the answer is so obvious Stevie Wonder would be able to win this game.

    All 4 devices were near each other and all about the same distance from the WiFi hotspot, about 5 feet. Turning off WiFi and turning it back on in Sierra seems to resolve the issue temporarily, but soon, it's back to being crap again. And I've found articles online that suggest deleting a few files would fix it, but I've tried that, and it hasn't. I never had this problem before upgrading. Anyone else out there had a similar issue and found a working solution?
     
  2. StarShot macrumors 6502

    StarShot

    Joined:
    Mar 31, 2014
    #2
    The last few months I've noticed wifi with El Capitan and now Sierra seems slow and sometimes locks up. I saw a piece on "Opera" and decided to download it. IMHO, it's much faster than Sierra and after a tryout of maybe a week, it's now my default browser on my MBA and on a Windows computer I also use. On the latter, Safari was also my default until it became almost unusable.
     
  3. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #3
    I just tried the speed test in Chrome, Safari and Firefox and got the same crappy results. I got the worst one yet at a whopping 8 mbps down, while my work laptop, which is Windows, just got 130 down, sitting next to my rMBP, on the same WiFi network, so it's not a matter of distance from the router. This isn't a browser issue, this is a "MacOS Sierra is a buggy piece of ****" issue.
     
  4. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #4
    If you substitute an ethernet cable and turn wifi OFF, do the download speeds change?
     
  5. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #5
    Don't know. Don't have a Thunderbolt->Ethernet adapter.
     
  6. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #7
  7. rshrugged macrumors 6502a

    Joined:
    Oct 11, 2015
    #8
    Which one of the steps temporarily worked? Could be a clue to someone to an eventual solution.
     
  8. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #9
    Deleting the files was temporary, the MTU stuff didn't seem to make a difference at all. I've been using Google DNS forever so there was nothing for me to change there.
     
  9. rshrugged macrumors 6502a

    Joined:
    Oct 11, 2015
    #10
    Just shooting in the dark -- one thing not mentioned at the previous link but I have heard before as a work-around remedy is, if on, shut off AirDrop.

    Something else to try if this is isolated to one network is to delete the existing one and set up a new one : System Preferences -> Network -> Assist me
     
  10. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #11
    I did a clean install of Sierra yesterday and back to slow speeds. Pathetic. Guess I have to live with it :rolleyes:
     
  11. rshrugged, Oct 15, 2016
    Last edited: Oct 16, 2016

    rshrugged macrumors 6502a

    Joined:
    Oct 11, 2015
    #12
    Another thing not listed on that troubleshooting page that you said you've tried already -- Create a temporary, new user account and test. Doubtful but possible that the issue is isolated to your existing one(s).

    EDIT -- meant to preface this with : If you've altered the clean install in any way - .......
     
  12. Phil_TFNQ macrumors newbie

    Phil_TFNQ

    Joined:
    Oct 16, 2016
    #13
    I upgraded from elCaptain to Sierra yesterday and every since whenever my iMac 27" goes into display sleep mode it disconnects from my wifi and I am having to reconnect when I wake the display. Not very good never had this problem before.
     
  13. rshrugged macrumors 6502a

    Joined:
    Oct 11, 2015
    #14
    @yg17
    Whether you're still at a clean install state or not, consider running the native wireless diagnostics tool for analysis, monitoring and reporting :

    https://support.apple.com/en-us/HT202663
     
  14. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #15
    It says my WiFi connection is working as expected.
     
  15. rshrugged macrumors 6502a

    Joined:
    Oct 11, 2015
    #16
    I don't know the full capabilities of the monitoring aspect of the tool. It might be worthwhile to get WiFi working in a proper state, as you were able to previously get it into temporarily, then see if the monitor will trip a useful report when/if your WiFi slows again.
     
  16. Analog Kid macrumors 601

    Analog Kid

    Joined:
    Mar 4, 2003
    #17
    It does for me. Over wifi I can watch a page load, over Ethernet it zips right through.
     
  17. matt2053 macrumors 6502a

    Joined:
    Jul 8, 2012
    #18
    Just for fun, turn off bluetooth and test again.
     

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