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Any one know how to block all network traffic with the Network Link Conditioner on Mountain Lion? Here's the custom offline profile I made that's not working. I'm trying to block the network for the iPhone Simulator. Thanks.

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Assuming you really want the answer how to block traffic rather than using the tool you have at hand, I'll suggest you use Little Snitch.

It is a firewall that works on interrupting the flow of data out from apps to the internet.

Perhaps someone will know how to bend the Network Link Conditioner to work as a firewall for the one app, but I'd start with one of the tools for that job if no one has a good recipe for the latter.

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