Wifi issue (Lion bug?) on mid 2011 iMac

Discussion in 'iMac' started by KimHansenDK, Aug 12, 2011.

  1. macrumors regular

    Jul 29, 2011
    About a month ago I bought the new mid 2011 iMac (21.5") model and have been happy with it. That being said I have experienced some Wifi issues lately. When I turn on the machine there is no connection to the internet even though it says that machine is connected. I then have to turn of the wifi and connect again - then it works!? Sometimes the connection is not chosen by default and I have to manually connect to my wifi network...

    Have any of you had the same issues with wifi? Maybe it is just a simple Lion bug/issue?
  2. macrumors 603

    Oct 14, 2008
    Yes, same story here. The WiFi on my 27" 2011 iMac behaves erratically. I didn't notice any issues when running Snow Leopard, it only started with Lion.

    No problems so far with the 2009 MBP running Lion.
  3. macrumors member

    Aug 8, 2011
    I've noticed this too.

    Wifi still shows as connected but web pages won't load. Turning it off and then on again resolves.
  4. macrumors 6502

    88 King

    Jun 18, 2011
    London, UK
    Same here when upgraded to Loin, I had to delete the WIFI profile to get connection back every time. I didn't find any solutions so I'm back using SL.
  5. macrumors newbie

    Jul 31, 2010
    Philadelphia, PA
    I have Same Problem

    Apple is aware of this problem. I have been providing info from my computer to help them find a solution.:(
  6. cxc
    macrumors member

    Nov 30, 2007
    Cologne, Germany
    Same here. Intermittent wifi dropouts.
    Lion is really a bugfest for me.
  7. macrumors member

    Nov 9, 2006
    Same here. WiFi issue, happens at home and at university.

    Fortunately I just turn it off, then when i turn it back on it re-connects :)
  8. macrumors 6502a

    Mar 4, 2010
    Long Island, NY
    same here, hopefully just a software glitch!!
  9. macrumors 68020

    Apr 12, 2011
    No problems here with my iMac with Lion using a Airport extreme dual band router.
  10. QuarterSwede, Aug 14, 2011
    Last edited: Aug 14, 2011

    macrumors G3


    Oct 1, 2005
    Colorado Springs, CO
    It happens on the white MacBooks as well. The router isn't the issue as I'm using a 2wire router (eh) and my iPhone and PowerBook (file server) have no issue on it when the problem is presenting on my MacBook.

    Another (related?) bug for me is that I can turn on/off wifi in the menubar but it never actually does anything. Ex. If I turn it off in the menubar it shows it as off but when I go to System Preferences > Network it shows it as still connected. To resolve the wifi issue connectivity I have to turn off/on wifi through System Preferences.
  11. macrumors 6502a

    Jan 25, 2010
  12. macrumors 6502


    Aug 10, 2011
    Same! My iMac 2011 2.5Ghz 21.5" keeps disconnecting from wifi, but the icon says it is full strength.

    I have 10.7 (Lion) but it re-connects when I run diagnostics :p
  13. macrumors regular

    Feb 5, 2006
    If your Mac is losing internet connection but wifi still says its connected, try giving yourself a manual IP address. I did this and the issue disappeared. However now I have a less frequent issue of wifi completely disconnecting at random.
  14. macrumors member

    Apr 8, 2008
    My new 2010 iMac is having this same issue with Lion. I have given it a manual ip and the problem still persists.
  15. macrumors 68030


    Sep 23, 2006
    My 2009 24" with Lion 10.7.1 works fine as does my 2010 MBP Pro. I have not updated my 27" 2010 and I guess I won't until people are comfortable this is resolved.

    That makes sense. The problem is with the wifi connection itself not DHCP so the IP address has no impact on stability.

  16. qap
    macrumors regular


    Mar 29, 2011
    Udine, Italy
    On mine all was fine untill the last firmware update 1 month ago :mad: now the wifi works fine but every "awake" is not connected. I've to do it manually :mad: Or after 4-5 minutes it connects again and alone… :confused:
  17. macrumors newbie


    Dec 31, 2010
    Western Montana
    My iMac Intel 27" dumps the WIFI connection almost every time I leave it for more than a couple of minutes. It shows it is disconnected tho, unlike some who are complaining it shows connected but isn't. I wish Apple would get this problem fixed already.
  18. macrumors 6502

    Jun 20, 2009
    New Mexico
    I've had a similar issue with my mid-2011 27" iMac, but only when running Windows 7 under Bootcamp. Wifi says it's connected, but web pages don't load. When I select to troubleshoot problem, it resets my router (Early 500GB Time Capsule) then it all works. How many of you having this problem have older TCs? Just wondering if that could be related to the problem.
  19. macrumors 6502a


    Jan 27, 2010
    Findlay, OH
    I just installed the new Wi-Fi update on my brand new iMac running 10.7.3, and my issues are solved. In OS X and Windows 7 Professional 64-Bit SP1. I'm using a brand new AirPort Extreme (5th Generation Dual-Band) that I bought last week.
  20. macrumors newbie

    May 30, 2012
    Still have problem

    May 2011 iMac running latest version of Lion still losing intenet connection with wifi. All other iphones, ipads and pcs in the house work with the wifi no problem. Deleted passwords in keychain and it helps temporarily. Why doesn't anyone think it's a hardware issue in the Mac since it's not a problem with every imac sold?
  21. macrumors 6502


    Dec 10, 2009
    Apple continues to dance around this issue but it is obviously a Lion problem. Never EVER experienced this issue until upgrading to Lion.

    Any ideas when Apple will find a solution? Annoying.
  22. macrumors newbie

    Jun 3, 2012
    I have the same on my. Mac book sine I switched to lion
  23. macrumors newbie

    Jul 13, 2008
    I updated my 2011 iMac to the Gold Master of Mountain Lion a 4 days ago and haven't had any wifi issues yet. Hopefully its all fixed now.
  24. macrumors regular

    Jun 14, 2009
    I have a 27" iMac with the exact same problem. Were you able to get yours fixed?
  25. macrumors newbie

    Aug 29, 2012
    Me too...got mine replaced

    I have been dealing with the wifi issues with my mid2011 imac since I bought it in March. Took over 4 months, trips to the genius bar, countless phone calls with AppleCare, sending capture data to the engineers...and what I was told is that it is a known issue with this model to which there is currently no resolution. They suggested that I use the ethernet cable.
    Eventually, they decided they would replace my machine. Switched back to the 15" MBP. What a bummer....since I really LOVED the iMac.

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