Mac OS X Mavericks Network Issues

Some users reported networking issues on the latest Mac OS 10.9 Mavericks. I got this tip from my colleague, and it seems to fix the intermittent network problem.

The fix is to create or edit this configuration file /etc/sysctl.conf . Add or edit this line

net.link.ether.inet.arp_unicast_lim=0

If you are familiar with editing the configuration file using vi or emacs, this is all you need to know. If not, here are the step by step instructions:

  1. Open Terminal in Applications -> Utilities folder.
  2. Type this command to invoke pico editor. Enter your password to continue.
    sudo pico /etc/sysctl.conf
  3. Add or edit this line
    net.link.ether.inet.arp_unicast_lim=0
  4. Press Ctrl+o to save the file. Press enter for confirmation.
  5. Press Ctrl+x to exit out of the pico editor.
  6. Reboot the computer.

If you are interested in the details about this change, please see this thread for more info.

https://discussions.apple.com/message/23520695#23520695