Mac - Error message: Airport does not have an IP address..

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Issue


I am having a connection issue with my Mac, the following error messages are displayed:
Airport is does not have an IP address and cannot connect to the internet , followed by Airport has the self-assigned ip address and will not be able to connect to the internet". What can be done?

Solution

  • Go to System Preference > Network
  • Click on the Setup button at the top go to Edit Configurations
  • Click the + button to add a configuration. Remove the old configurations using the - button.
  • Set Airport to the top of the list in the left sidebar (Click on the small gear icon > Set the order of service > drag Airport to the top of the list.
  • In the left sidebar select: "Wi-Fi"

Then in the right pane:
  • Network Name > Check if the name of your network is present.
    • Check the "Request to connect to new networks"

Go to the Advanced tab at the bottom right:
  • In Wi-Fi
    • Drag your preferred network at the top of the list.
    • Delete unnecessary networks clicking on the - button.
    • check the "Remember the networks....." and clear the other check boxes
  • Verify that the security mode is properly configured (WPA, WPA2, WEP...depending on your how your access point is configured)
  • In TCP/IP,
    • Configure IPv4 = "Use DHCP"
    • Configure IPv6 = "Automatic"
    • Leave the other field empty
  • In DNS:
    • Leave the field empty
  • In WINS
    • Leave then default settings
  • In 802.1X
    • Only check the box "Enable automatic connection"
  • Proxy
    • Check "Use Passive FTP (PASV)" only.

Save your settings and try to connect again.

Thanks to Sanspseudo for this tip.
Jean-François Pillou

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