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HT2497: Mac Basics: Connecting your Mac to the Internet

Learn about Mac Basics: Connecting your Mac to the Internet

HT2497 Why is it so difficult to connect a MacBook Pro to the internet using a wifi connection?

185 Views 2 Replies Latest reply: Oct 15, 2013 1:16 PM by Linc Davis RSS
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Oct 15, 2013 7:03 AM

I'm sat with a Toshiba laptop, and ipad2 and a MacBook Pro. The laptop and the iPad are happily connected to the internet using wifi.  The MacBook Pro simply refuses to connect - and not for the first time.

 

I've removed the wifi connection from the keychain and attempted to reestablished it, but without success.

MacBook Pro, OS X Mountain Lion (10.8.5)
  • Frank Caggiano Level 7 Level 7 (22,785 points)

    What happens when you attempt to conect with the MBP?

  • Linc Davis Level 10 Level 10 (107,735 points)

    Back up all data before making any changes.
         
    Step 1
      
    Take all the applicable steps in this support article.
      
    Step 2
       
    If you're running OS X 10.8.4 or later, run Wireless Diagnostics and take the remedial steps suggested in the summary that appears, if any. The program also generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.

    Step 3

    If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. Continue if you find that Wi-Fi is faster with Bluetooth disabled.

    From that same menu, select Open Bluetooth Preferences. If the box labeled Discoverable is checked, uncheck it. Click the Advanced button, and in the sheet that opens, uncheck the top three boxes, if any are checked. Click OK. Enable Bluetooth and test again.

    If the application called "Bluetooth Setup Assistant" is running, quit it.

      
    Step 4

    This step will erase all your settings in the Network preference pane. Make a note of them before you begin, and recreate them afterwards. It may be helpful to take screenshots of the preference pane.

    Triple-click the line below on this page to select it:

    /Library/Preferences/SystemConfiguration

    Right-click or control-click the highlighted line and select

    Services Reveal

    from the contextual menu.* A folder should open with an item named "SystemConfiguration" selected. Move the selected item to the Trash. You may be prompted for your administrator password.

    *If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select

    Go Go to Folder...

    from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.

    Step 5

     

    Reset the System Management Controller.

    Step 6

    Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

    Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.

    If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.

     

    Keeping your confidential data secure during hardware repair

    *An SSD doesn't need to be zeroed.

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