How can I monitor network usage by process on Mac OS X?

Posted by psmith on Super User See other posts from Super User or by psmith
Published on 2011-11-05T12:02:12Z Indexed on 2012/07/10 3:18 UTC
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osx

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networking

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monitor

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traffic

Is there any way to find out which process using how much internet bandwidth on Mac OS X Lion? I'm on mobile internet now, which is not very fast, so it would be nice if I can tell that for example, Chrome using 10kB/s, and Skype using 2kB/s.

I can see the total amount of traffic in Activity Monitor, but it is not enough for me.

I'd like to use an existing application, not interested to write an app like this. And I'm not interested in the actual traffic, only the number of bytes transferred and received by each processes.

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