mdutil

Manage the metadata stores used by Spotlight for indexing. More information: https://ss64.com/osx/mdutil.html.

• Show the indexing status of the startup volume:
  mdutil -s {{/}}
• Turn on/off the Spotlight indexing for a given volume:
  mdutil -i {{on|off}} {{path/to/volume}}
• Turn on/off indexing for all volumes:
  mdutil -a -i {{on|off}}
• Erase the metadata stores and restart the indexing process:
  mdutil -E {{path/to/volume}}