Skip navigation

no internet connection

1659 Views 12 Replies Latest reply: May 15, 2012 6:56 AM by artyphil RSS
artyphil Calculating status...
Currently Being Moderated
May 11, 2012 3:09 AM

After updating to 10.7.4 using the downloaded combo version I have no internet connection - where before updating all was working perfectly - I have tried using network diagnostics but nothing works. When I installed Lion all worked fine and the upgrade to 10.7.2 worked fine as well with internet connections, I did try the 10.7.3 updater and had the same problems I'm having now! I thought that this upgrade might have resolved that issue but it seems not - please can someone help, I really do not want to go back to the original lion install and have to re-install all my apps' again!!

Mac Pro, Mac OS X (10.7.4), After updating I have no internet
  • DrVenture Level 2 Level 2 (180 points)
    Currently Being Moderated
    May 11, 2012 10:05 AM (in response to artyphil)

    Are you connecting via Ethernet or Wireless?

  • Michele Gardner Level 2 Level 2 (390 points)
    Currently Being Moderated
    May 11, 2012 10:25 AM (in response to artyphil)

    Same here but only at work. This is via wifi. Ethernet works fine but wifi will not get mail, load pages or go to the app store. Without saving old installs though, I'm not sure it's possible to install anything under 10.7.4.

  • DrVenture Level 2 Level 2 (180 points)
    Currently Being Moderated
    May 11, 2012 10:34 AM (in response to Michele Gardner)

    Michele, I wonder if your preference PLISTs where screwed up during the upgrade?

     

    Here is how you can check....

     

    Open a terminal and do:

     

    mkdir ~/Desktop/prefs

    sudo cp -pR /Library/Preferences/SystemConfiguration/ ~/Desktop/prefs/

     

    This will make a back up of your system preferences

     

    For the next step, I will assume you know the passwords and such to reconnect back to your work's WiFi (and any other settings like Proxies, etc). If not stop here.

     

    In the terminal again do

     

    cd /Library/Preferences/SystemConfiguration

    sudo rm -rf *.plist    <<make sure you copy and paste this line, because rm -rf can be deadly if issued incorrectly>>

     

    Now reboot.

     

    When you Mac comes back up, you will have no network preferences set. Please reconnect back to your works WiFi and see what happens.

     

    If you need to restore you old config, just open a terminal and do:

     

    sudo cp -pR ~/Desktop/prefs/ /Library/Preferences/SystemConfiguration/

  • Michele Gardner Level 2 Level 2 (390 points)
    Currently Being Moderated
    May 11, 2012 10:36 AM (in response to Michele Gardner)

    Solved it by turning Stelth Mode off.

  • Michele Gardner Level 2 Level 2 (390 points)
    Currently Being Moderated
    May 11, 2012 10:37 AM (in response to DrVenture)

    Thank you though!

  • DrVenture Level 2 Level 2 (180 points)
    Currently Being Moderated
    May 11, 2012 11:01 AM (in response to artyphil)

    This may sound silly, but did you try hard rebooting your modem (pulling the power and battery (if any))?

  • Michele Gardner Level 2 Level 2 (390 points)
    Currently Being Moderated
    May 11, 2012 9:43 PM (in response to artyphil)

    From another thread, in case you didn't see it....

    "I deleted all System cache's (using OnyX but I'm sure there are other ways of doing it) and then rebooted. After that wifi was back and working."

  • erola Calculating status...
    Currently Being Moderated
    May 13, 2012 11:10 AM (in response to artyphil)

    I have been trying to solve the same problem for hours: my MacBook Pro could not connect to ANY wifi point... In the end I managed to make it work (quite randomly) by disabling and re-enabling the firewall. Hopefully this will be useful to someone

  • wagedu Calculating status...
    Currently Being Moderated
    May 15, 2012 6:25 AM (in response to artyphil)

    Hi, I've been using my Mac with Lion without a problem for months.

    But now I started at a new job and my computer connects to the wireless networks but then I get an exclamation mark on the WiFi icon on the menubar and "Alert: No Internet Connection".

    Network Prefs: self-assigned IP

     

    The main difference between both networks is that home is a modem router, and at work it's modem + router

     

    I've tried all solutions that I've found, but since any other Mac running Lion can connect to the same work network without a problem it's got to be me.If I run into the Bootcamp partition, Win7 connects.

    I've manually copied the IPv4 Network settings of the Mac Lion sitting next to mine. Nuthin. Well, yes, the exclamation mark went away from the menubar and the browsers stay trying to connect... forever.

     

    I thought it could be that the system "stuck" with the first network it was configured to, but no. I changed my HOME network SSID and OSX connected again. It may be a b/g/n problem but no one at work figured a solution yet.

     

    By the way: firewall has NEVER been on.

     

    What I've tried:

    - ping to the router: no answer (??)

    - delete all "preferred networks" from Network prefs. Delete them from keychain. Even give open authorisation for anyone to use'em on Keychain.

    - Delete all System Configuration prefs

    - sudo ipfw list , sudo ipfw flush

    - untick the "Use Passive FTP Mode" for ethernet

     

    Please, could anyone help me or point me in the right direction?

Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)

Legend

  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.