How can I track application bandwidth usage? I would like to be able to summarize daily network bandwidth usage for running applications. Additional details, such as a sorted list of addresses by traffic usage, would be nice to have as well but not essential. For the most part I just want to know which apps are using the most bandwidth.

All of the solutions seem far too detailed or complicated. These include:


Terminal applications like nettop
Commercial applications like LittleSnitch


The closest I've come is use nettop and export its results to CSV. I'm hoping there is something much simpler.
Use Activity Monitor

Just open Activity Monitor (Applications -> Utilities -> Activity Monitor) and navigate to the Network tab. You'll be able to see which apps are sending/receiving data and how much per app/process.