Private Eye logo Private Eye is a free network monitor for Mac

Notice: Private Eye is no longer actively maintained.
You can find a more modern network monitor in Radio Silence.
Monitoring the network with Private Eye
See connections in real-time

See connections in real-time

When an app makes a network connection, you see it instantly on your screen. There's no delay and you don't have to use a separate recording mode.

Show the connections you are interested in

Filter connections by app or direction

Interested in the connections of a single app? Only outgoing traffic? You can filter the list of connections to avoid being overwhelmed by noise.

Private Eye is lightweight

Keep your Mac fast and responsive

Close the app window, and the network monitor is automatically turned off. Private Eye stays out of the way by slacking off whenever you aren't looking.