View Full Version : Find out which app using network

13th May 2010, 12:57 PM
Hello friends

I am wondering if there's any way to find out which app is currently using network bandwidth.

For example, if I have a few apps open and I can see in iStat menus that there is activity on the network, how can I find out which one is sending/receiving the data?

http://img.skitch.com/20100513-qt6dh8nrpky621gcqgquwdqppw.preview.jpg (http://skitch.com/nickd/ddehn/screen-shot-2010-05-13-at-12.45.40-pm)
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I am wanting to find out because sometimes it's not immediately obvious which application is using the internet. I know of course that apps can access the net in the background without showing any outward signs of doing so; I am wanting to find out which process is doing this though.

I am running 10.6.2 on a 24" iMac (early 2008).



13th May 2010, 01:20 PM
Have a look at Little Snitch - this app has a window that lets you see all the outgoing comms and the ip details that each app is using. There is a demo version that works for 2 hours at a time so give it a go and see if it solves your question.


13th May 2010, 04:16 PM
open the network utility and go netstat tick the bottom of the 4 bubbles and click netstat
rec q is inbound packets send-Q is outgoing packets etc see where they are going.

16th May 2010, 11:40 AM
Thanks guys!

I've ended up using Little Snitch and it does exactly what I want!