Internet broken on one OS, not the other

A few weeks ago, I was trying to fix some bug that was causing my main operating system (Mountain Lion) on my MacBook Pro (early 2011) to constantly create virtual memory, killing my battery at tremendous rates, eating up my hard drive and destroying my computer's performance. I spent forever trying to fix the stupid problem, and found somewhere that deleting certain .plist files (but not these specific apple ones) would fix the problem.
It fixed the problem! No more slow computer!
And then my internet stopped working. But only on that operating system, Mountain Lion. I have another operating system partitioned off, Snow Leopard, that I use for legacy software, and it works perfectly fine still.
A week ago I upgraded Mountain Lion to a developer version of Maverick (no comments), since Mountain Lion was screwed anyways without internet and I thought, why not? Maverick works great, and I thought the update might fix the internet, but it [I]still doesn't work.[/I]
I've deleted all my network connections, deleted all network plists and recreated everything from scratch. The connection is great, I have a local IP address—it just won't connect to any websites!
Google.com would actually work for a while and allow me to search things. Weirdest thing. It stopped working though.
Again, my Snow Leopard is getting internet fine. That's what I'm on now.
I've searched the web up and down for this specific problem and I can't find anything on it. So I finally gave up on trying to fix it myself, and here I am.
Help me please?

Have you tried trashing /Library/Preverences/SystemConfiguration/NetworkInterfaces.plist ?
In some instances renaming the folder /Library/Preverences/SystemConfiguration and adding .old on the end and rebooting the mac will refresh all of the Network Interfaces and Power Management settings enough to resolve networking issues.
Have you tried to connect to a different network? Is the issue the same on all Networks? Does Ethernet work?
Are you able to use Network Utility to Ping any site? Are you able to Ping an i/p address on the internet?

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"Michael Fesser" <[email protected]> wrote in message
news:[email protected]..
> .oO(Mark A. Boyd)
>
>>Strange. I don't think I've ever seen these headers
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>>
>>
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>>
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hi catfish197621,
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Internet broken on one OS, not the other

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