Bert Hubert wrote googerteller, which:

Makes a little bit of noise any time your computer sends a packet to a tracker or a Google service, which excludes Google Cloud users.

Bert Hubert

Read about it in Berts blog post Tracker Beeper, where he is describing his motivation and goals. I ran googerteller in my Mac console and I was surprised. At some point you will shut down the program because you cannot stand the noise anymore. However, the commands for starting it up, are:

  1. brew tap robertjakub/teller
  2. brew install --HEAD googerteller
  3. sudo tcpdump -nql | teller

Bert´s GitHub page has more details on how to run the tool.