Thank you very much for your reply. I magic barred it on my mac and couldn't find it. A little more help? Know the direct path? Is it global or per browser? Thanks again.
BTW. 0.0.0.0 is not "your own IP", that would be 127.0.0.1. 0.0.0.0 is non-routable, so always resulting in error.
cat /etc/hosts
if it outputs something that has to do with network, you know the file is there :). It might be that default user-facing tools on Mac don't look for system files?