6 Replies Latest reply: Jun 12, 2015 5:52 PM by Scotrivana
tadfromga Level 1 Level 1

I have a macbook air purchased last fall.  Since I came back from a one-week trip around Christmas, I have been unable to connect to my home wifi network.  There is an exclaimation mark in the wifi icon.  I have several other devices (mac, iphone, ipad, pc), and most of them work fine - except my son's macbook pro and my wife's iPad.  We tried several recommended solutions - "forgetting" the network and re-establishing the connection.  I looked online for possible solutions, but so far, no luck.  What is going on?  Does anyone have any idea?

MacBook Air, iOS 7
  • dominic23 Level 8 Level 8
    Mac OS X

    Power off the router. Unplug it from the wall. Wait for few  minutes.

    Power off the router. Wait a while.

    Connect the router back to to the wall.

    Power the router back on. Wait  until all lights are lit properly. It will take a while.

    Restart the computer.

    Start up in Safe Mode.



  • Lexiepex Level 6 Level 6
    Mac OS X

    This exclamation mark in the Airport icon means that WiFi is working but the internet connection is lost.

    You have to power off the modem, and the router, both . Then power up the modem and let it start up completely, then start up the router and let it start up completely, sometimes you also have to turn Airport off on the computer then on again when both modem and router are completely started up.

  • tadfromga Level 1 Level 1

    Thank you both, but neither one worked.


    I have a "guest" access with my router, and when I log in on that network, I can get to the Internet.  Moreover, other devices that are connected are working fine.  So, I don't think it is the router issue.


    I am not getting an IP address, though - when I look at the network under "Advanced" setting, the IP address space is empty.

  • Linc Davis Level 10 Level 10

    When you see an exclamation point in the Wi-Fi menu, from the menu bar, select


    System Preferences... Network


    Click the Assist me button and select Assistant. Follow the prompts. You may get a warning that Wi-Fi is not available, that you're too far from the base station, or that you're using the wrong password.


    Assuming that you've ruled out those possibilities, restart the computer and try again. If there's no change, click the lock icon in the lower left corner of the preference pane and authenticate, if necessary. From the Location menu at the top of the window, select Edit Locations. A sheet will drop down. Click the plus-sign button to create a new location. Give it any name you want. In the new location, set up the Wi-Fi service with the same settings you used before. Click  Applyand test.


    If there's still no connection, and if you have control of the router, compare its settings to Apple's recommendations. Some third-party routers may be incompatible in 802.11b/g/n radio mode. Try setting the mode to 802.11n only.

  • Lexiepex Level 6 Level 6
    Mac OS X

    Hello Linc, I need your help in this thread


    please have a look,


  • Scotrivana Level 1 Level 1

    This worked for me. Thanks