brew install vault

To restart vault after an upgrade:
  brew services restart vault
Or, if you don't want/need a background service you can just run:
  /Users/my-user/brew/opt/vault/bin/vault server -dev
==> Summary
🍺  /Users/my-user/brew/Cellar/vault/1.11.2: 8 files, 185.2MB

 To have launchd start vault now and restart at login:
  brew services start vault
Or, if you don't want/need a background service you can just run:
  vault server -dev

See aslo

• vault [ secrets enable | kv put | kv get | server | operator | auth | token | secrets | auth enable | status ] Vault Changelog, vault help