steamcmd

Install command: 
brew install --cask steamcmd

Name: SteamCMD

Command-line client for Steam

https://developer.valvesoftware.com/wiki/SteamCMD

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

Cask code: steamcmd.rb on GitHub

Current version: 1757650979

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
steamcmd 264
Installs (90 days)
steamcmd 799
Installs (365 days)
steamcmd 2,625