Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I need to know which applications are accessing the internet on my Mac. I want to know how much data they uploaded and downloaded. I got a steep 3G bill this month because some stupid app is downloading something in the background, and I don't know what it is.

All I need to do, is find it, and block it, or turn it off.

Can anyone please help?

share|improve this question
up vote 2 down vote accepted

Try Little Snitch

A firewall protects your computer against unwanted guests 
from the Internet. But who protects your private data from 
being sent out? Little Snitch does!
share|improve this answer
Thanks, this is perfect! – josef.van.niekerk May 11 '11 at 10:07

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .