If you called Apple technical support for assistance with this issue, and you were instructed to use the Terminal utility to modify your system, you can reverse those changes now (before or after updating). If you had to change your "hosts" file, reverse the change by typing this command in the Terminal and then pressing Return:
sudo mv /etc/hosts.org /etc/hostsIf you were instructed to make changes to your NetInfo database using the command sudo nicl . create /config/lookupd/hosts Timeout 5, reverse it by typing this command in the Terminal and then pressing Return:
sudo nicl . delete /config/lookupd
You must restart the computer after using either of these commands for the changes to take place.