Recently I had problems with my Airport assigning itself a “self-assigned IP address”.
I tried various suggested methods for fixing this and none of them worked. However I managed to fix it in the end without any online help, just some common sense and various stages of trial and error. So in case it helps anyone else, this is what worked for me.
What you will need:
- an Ethernet (network) cable (and an Ethernet port on your Mac)
- access to your network both Wired and Wireless (WiFi)**
**I am working on the assumption that your Wireless and Wired network are the same (both from the same router)
Connect to your network using the Ethernet (network) cable so you have a working WIRED (ETHERNET) connection to the same router as your WIRELESS comes from. (If you aren’t sure just use your ethernet cable to connect your Mac straight to your router – this won’t take long.)
Open your Network Settings
Apple Mark > System Preferences > Network
Click the Lock to allow changes. Enter your Admin details if asked.
Make sure you are accessing your AIRPORT settings (not Ethernet or Firewire). Then click Advanced.
On the Airport tab use the – sign to delete the network if you have added it previously. Then click the + sign to add a new network.
There are two ways to add a network (as you probably know). I always go for the Show Networks option as it is easier for me. If you know all your details though, it may be faster to just type them in yourself. Make sure your get the security right. If it is a private home network the chances are it will be WPA2 or WEP.
When you’ve finished adding your network go back to the main Network Settings window.
In the main Network Settings window, click on your ETHERNET connection then write down the IP address. If you are on a private home network your IP should start 192.xxx.x.x, or in some cases 172.xx.x.x.
When you have your working IP Address, go back to Airport Advanced Settings and click on the TCP/IP tab.
From the Configure IPv4 drop down menu, choose Using DHCP with manual address.
In the IPv4 Address box, type the IP Address you wrote down from your working ETHERNET connection. You don’t have to change anything else.
When you have finished, click OK.
Your Airport should be working now!
But wait, you aren’t finished!
This is the most important
Click Apply in the bottom right hand corner. If you don’t do this, all the changes you made will be lost.
OK, NOW you are finished.
Hope this works for you.