On all of my Windows computers, I use an actively updated Hosts file from http://winhelp2002.mvps.org/hosts.htm to do system-wide ad blocking. I'm curious as to it being possible to do the same thing on macs. This would especially help on PPCs since you wouldn't need to slow down your browsing experience by using an adblocker since the hosts file prevents even connecting to ad servers. The website I like has instructions for Mac installation, but it doesn't seem to work on the few macs I tried on (both PPC and Intel).
SOLUTION: I actually just got it working by following the directions here: http://www.makeuseof.com/tag/how-to-edit-the-mac-os-x-hosts-file-and-why-you-might-want-to/
I only went to /private/etc/ then replaced the file directly, then flushed the DNS and now it works perfectly.
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