Use nettop command to check per-application network activity in OS X
While broadband Internet speeds let you do more online, if your system uses a lot of bandwidth, you might run into some limitations. In some cases, ISPs may throttle your network speed after you have reached a certain usage level, or may even charge you additional fees for the extra bandwidth used. In other cases, a constant upload or download from one system may saturate your bandwidth and greatly slow down Internet-based activities for the other computers that share the connection.
For the most part, programs will not use a great amount of bandwidth, but there are times when one … Read more