jettison

Install command: 
brew install --cask jettison

Names: Jettison, St. Clair Software Jettison

Automatically ejects external drives

https://stclairsoft.com/Jettison/

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

Cask code: jettison.rb on GitHub

Current version: 1.9.2

Current version requires: macOS >= 10.13

Analytics:

Installs (30 days)
jettison 45
Installs (90 days)
jettison 94
Installs (365 days)
jettison 219
Fork me on GitHub