DHCP not working with MacBook Pro

Discussion in 'MacBook Pro' started by kenchie, Nov 27, 2014.

  1. kenchie macrumors newbie


    Apr 26, 2011
    Hi -

    One of our users on a large college network has an early 2008 MacBook Pro running Lion. The other day the laptop froze, and ever since it has not been able to pick up IP addresses via DHCP, it will only assign itself a 169.254 range address. The problem exists on both ethernet & wi-fi. I have tried the following without success;

    Removed proxy entries/PASV mode
    New Location
    Different user account
    Trashed the 'SystemConfiguration' folder
    Removed all college entries from keychain
    Installed USB ethernet adapter
    Reset PRAM

    The ethernet cable and wallport it is connected to work fine with other PCs.
    I am running out of ideas - any suggestions please?

  2. Bruno09 macrumors 68020

    Aug 24, 2013
    Far from here

    you have tried all that must be done in such a case.

    You might add : use Disk Utility to "Check the disk" and "Repair the permissions".

    If no success, reinstall the system (without wiping the disk).
    Cmd + r on boot (OS X Recovery).
  3. simonsi macrumors 601


    Jan 3, 2014
    What happens if you assign it an ip address, gateway and DNS manually?

    How long is the lease assigned by the network? - it might be seeing the laptop as a duplicate ip address and blocking it - What was done to unfreeze the laptop?


    No he hasn't.
  4. ajbudis macrumors newbie

    Jun 30, 2013
    Go into system preferences -> network and create a new location and make sure to hit apply after creation.

Share This Page