fsmonitor

Install command: 
brew install --cask fsmonitor

Name: FSMonitor

Visualize filesystem changes in realtime

https://fsmonitor.com/

Development: Pull requests

Cask JSON API: /api/cask/fsmonitor.json

Cask code: fsmonitor.rb on GitHub

Current version: 1.2,137

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
fsmonitor 13
Installs (90 days)
fsmonitor 37
Installs (365 days)
fsmonitor 170