Fix Airport Self-Assigned IP Address Leopard · Wednesday January 2, 2008

I spent many hours researching, troubleshooting, and trying to find a solution to my Apple PowerBook getting an Airport self-assigned IP address.

This problem seemed to originate after I installed the Login and Keychain Update 1.0 (30 October 2007) for Mac OS X “Leopard” 10.5.

The steps that worked for me was to:

  1. Delete the Airport preference file /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
  2. Verify/Repair my Login Keychain using Utilities > Keychain Access
  3. Reboot into Safe Mode (by holding down the Shift key during startup)
  4. Turn my computer off, then boot up normally.

I have read other user reports that had success by disabling the “Back to My Mac” .Mac feature, creating a new Network Location, or by disabling and re-enabling Airport access whereby triggering a “Renewing DHCP Lease”.

— Ryan J. Bonnell

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