6 Replies Latest reply: Mar 30, 2012 10:01 PM by Linc Davis
revjay Level 1 Level 1 (45 points)

Both wi-fi and ethernet connect fine (showing IP addresses...green lights in Network Preferences), however, browser or other internet connected applications will not connect to the internet.

Seems like I have tried every solution I could find here on discussions.

At a loss for a solution.

My Macbook will not connect to my neighbors' network.

Other computers and devices on my network are working perfectly.

Ping is inconsistent...everything from timeout to 20ms

 

I'd love some help fixing this.


MacBook (13-inch Late 2007), Mac OS X (10.7.3)
  • 1. Re: After 10.7 upgrade, Macbook will not connect to internet
    maskeda Level 1 Level 1 (15 points)

    Set IPV6 to Link-local only, or if you have the option set it to off.

  • 2. Re: After 10.7 upgrade, Macbook will not connect to internet
    Linc Davis Level 10 Level 10 (118,490 points)

    Please read this whole message before doing anything.

     

    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

     

    The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. The instructions provided by Apple are as follows:

     

    • Be sure your Mac is shut down.
    • Press the power button.
    • Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
    • Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).

     

    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.

     

    The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.

     

    Test while in safe mode. Same problem(s)?

     

    After testing, reboot as usual (i.e., not in safe mode.)

  • 3. Re: After 10.7 upgrade, Macbook will not connect to internet
    revjay Level 1 Level 1 (45 points)

    Linc Davis,

     

    Booting in safe mode worked...you are right, things were substantially slower, but did allow me to access internet in a smattering of programs.

     

    Progress.

     

    Rebooted as usual...no internet connection.

     

    Tell me you know what I should do next...

     

     

  • 4. Re: After 10.7 upgrade, Macbook will not connect to internet
    Linc Davis Level 10 Level 10 (118,490 points)

    Please read this whole message before doing anything.

     

    This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

     

    Third-party system modifications are a common cause of usability problems. By a “system modification,” I mean software that affects the operation of other software – potentially for the worse. The following procedure will help identify which such modifications you've installed. Don’t be alarmed by the complexity of these instructions – they’re easy to carry out and won’t change anything on your Mac.

     

    These steps are to be taken while booted in “normal” mode, not in safe mode. If you’re now running in safe mode, reboot as usual before continuing.

     

    Below are instructions to enter some UNIX shell commands. The commands are harmless, but they must be entered exactly as given in order to work. If you have doubts about the safety of the procedure suggested here, search this site for other discussions in which it’s been followed without any report of ill effects.

     

    Some of the commands will line-wrap or scroll in your browser, but each one is really just a single line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then either copy or drag it. The headings “Step 1” and so on are not part of the commands.

     

    Note: If you have more than one user account, Step 2 must be taken as an administrator. Ordinarily that would be the user created automatically when you booted the system for the first time. The other steps should be taken as the user who has the problem, if different. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.

     

    Launch the Terminal application in any of the following ways:

     

    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

     

    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

     

    ☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Terminal in the page that opens.

     

    When you launch Terminal, a text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” (without the quotes) and press return. You should then get a new line ending in a dollar sign.

     

    Step 1

     

    Copy or drag – do not type – the line below into the Terminal window, then press return:

     

    kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'
    

     

    Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.)

     

    Step 2

     

    Repeat with this line:

     

    sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|edu\.mit|org\.(amavis|apache|cups|isc|ntp|postfix|x)/{print $3}'
    

     

    This time, you'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.

     

    Step 3

     

    launchctl list | sed 1d | awk '!/0x|com\.apple|edu\.mit|org\.(x|openbsd)/{print $3}'
    

     

    Step 4

     

    ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta}* L*/Fonts 2> /dev/null
    

     

    Important: If you synchronize with a MobileMe account, your me.com email address may appear in the output of the above command. If so, anonymize it before posting.

     

    Step 5

     

    osascript -e 'tell application "System Events" to get name of every login item' 2> /dev/null
    

     

    Remember, steps 1-5 are all drag-and-drop or copy-and-paste, whichever you prefer – no typing, except your password. Also remember to post the output.

     

    You can then quit Terminal.

  • 5. Re: After 10.7 upgrade, Macbook will not connect to internet
    revjay Level 1 Level 1 (45 points)

    Remember...I can't view Apple Discussions and this diagnostic process on my Macbook in normal mode because I can not access the internet there. I'm not sure how I can cut and paste or drag and drop commands into terminal...

     

    Is there some other way to work around this and diagnose my problem described in my first post?

  • 6. Re: After 10.7 upgrade, Macbook will not connect to internet
    Linc Davis Level 10 Level 10 (118,490 points)

    I'm not sure how I can cut and paste or drag and drop commands into terminal.

     

    Copy the commands to a USB storage device and transfer them to the affected machine.