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Wifi won't turn on since upgrade to Lion

74696 Views 278 Replies Latest reply: Dec 2, 2012 11:44 PM by 2yb RSS Branched to a new discussion.
  • federicofromchicago Calculating status...
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    Jul 29, 2011 7:49 AM (in response to kevinrobers)

    does the computer from which you copy the plist files have to have the same airport card and firmware? or does that not matter?

  • jacen2141 Calculating status...
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    Jul 29, 2011 7:58 AM (in response to federicofromchicago)

    That doesn't seem to matter. The files I used came from a 2010 MacBook Pro.

  • peterfromwallingford Calculating status...
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    Jul 29, 2011 6:39 PM (in response to kevinrobers)

    I too am having problems with wifi connections after upgrade to Lion from Snow Leopard on my IMac. Repeated turning wifi on and off eventually accomplishes the connection. If I walk away and the computer goes to standby, I loose the connection again.  So annoying that I'm considering reinstalling Snow Leopard that was working just fine. This many people having issues and no response from Apple. What's up with that.

  • Roman_G Calculating status...
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    Jul 30, 2011 3:24 AM (in response to kevinrobers)

    + 1


    same mid 2008 mbp + lion : /

  • Gabriel_gabo Calculating status...
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    Jul 31, 2011 6:52 AM (in response to kevinrobers)

    Solved temporary going to system preferences,net, airport, advanced, tcp/ip configure ipv6 to local only.....mine was in automatic.

  • Dchilders001 Calculating status...
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    Jul 31, 2011 2:56 PM (in response to kevinrobers)

    Same issue here.  Worked fine for one day then just stopped .  I've tried everything mentioned in this thread but nothing changes.  Bad, bad timing for me.  I sure hope Apple addresses this or I will have to back up to SL. The last line in the specs says it all


    Here are the specs on my machine. 

    Processor  2.4 GHz Intel Core 2 Duo

    Model Name:          MacBook Pro

      Model Identifier:          MacBookPro3,1

      Processor Name:          Intel Core 2 Duo

      Processor Speed:          2.4 GHz

      Number of Processors:          1

      Total Number of Cores:          2

      L2 Cache:          4 MB

      Memory:          4 GB

      Bus Speed:          800 MHz

      Boot ROM Version:          MBP31.0070.B07

      SMC Version (system):          1.16f11

      Serial Number (system):          xxxxxxxxxxxxxxxx

      Hardware UUID:xxxxxxxxxxxxxx

      Sudden Motion Sensor:

      State:          Enabled


    Software Versions:

      CoreWLAN:          2.0 (200.46)

      CoreWLANKit:          1.0 (100.43)

      Menu Extra:          7.0 (700.42)

      configd plug-in:          7.0 (700.57)

      System Profiler:          7.0 (700.3)

      IO80211 Family:          4.0 (400.40)

      WiFi Diagnostics:          1.0 (100.26)

      AirPort Utility:          5.5.3 (553.20)



      Card Type:          AirPort Extreme  (0x168C, 0x87)

      Firmware Version:          Atheros 5416:

      MAC Address:          xxxxxxxxxxxxxxxxxxxxxxxx

      Locale:          FCC

      Country Code:

      Supported PHY Modes:          802.11 a/b/g/n

      Supported Channels:          1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165

      Status:          Network Service Inactive

  • Dchilders001 Level 1 Level 1 (0 points)
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    Jul 31, 2011 3:34 PM (in response to kevinrobers)

    Ethernet works fine.  I've been reading the thread and am waiting on Apple, just wanted to add my specs in case they would help.

  • jacen2141 Level 1 Level 1 (0 points)
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    Aug 1, 2011 8:29 PM (in response to Dchilders001)

    Any word from anyone?  I haven't heard back from my support engineer in several days. 

  • logix812 Level 1 Level 1 (0 points)
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    Aug 2, 2011 5:00 PM (in response to kevinrobers)

    I am having the same issue.  If I turn my wifi off and then attempt to turn it back on, it will not turn on. I have to reboot the computer to get it back.


    I'm running a Early 2008 MBP 17" 2.5ghz Core 2 Duo under Lion (11A511)



    CoreWLAN: 2.0 (200.46)

    CoreWLANKit: 1.0 (100.43)

    Menu Extra: 7.0 (700.42)

    configd plug-in: 7.0 (700.57)

    System Profiler: 7.0 (700.3)

    IO80211 Family: 4.0 (400.40)

    WiFi Diagnostics: 1.0 (100.26)

    AirPort Utility: 5.5.3 (553.20)


    Card Type: AirPort Extreme  (0x14E4, 0x8C)

    Firmware Version: Broadcom BCM43xx 1.0 (

  • SacredKow Calculating status...
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    Aug 4, 2011 10:48 AM (in response to logix812)

    I have this same config and I have the same issue.... it actually started back in Snow Leopard, which I believe is different then many people here have reported. It's the reason I upgraded to Lion in hopes of getting my wifi back. It got to the point where I reboot would "fix" the issue but it never lasted long. Sometimes minutes, sometimes a day.


    With Lion Ihad wireless support for a few days, even after sleeping the system. Now it is dead. A reboot seems to have no impact. Just an empty pie slice up by my clock... I want my pie back.


    I think if you do some digging you will actually see this has been an issue for Apple for quit some time. not just with Lion. I'm rather disappointed Apple has let it go on this long. It's been nearly a year for me. It was nice to see people posting interactions they had with Apple engineers but that seems to have gone cold now.


    Here's my specs:


    Software Versions:

      CoreWLAN:    2.0 (200.46)

      CoreWLANKit:    1.0 (100.43)

      Menu Extra:    7.0 (700.42)

      configd plug-in:    7.0 (700.57)

      System Profiler:    7.0 (700.3)

      IO80211 Family:    4.0 (400.40)

      WiFi Diagnostics:    1.0 (100.26)

      AirPort Utility:    5.5.3 (553.20)



      Card Type:    AirPort Extreme  (0x14E4, 0x8C)

      Firmware Version:    Broadcom BCM43xx 1.0 (

      Wake On Wireless:    Supported

      Status:    Off



  • plax Calculating status...
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    Aug 8, 2011 5:51 AM (in response to kevinrobers)

    I have the exact same issue. WiFi won't turn on on my Late 2008 Macbook Pro after upgrading to Lion and restarting.


    Still no fix for this?



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