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Caligula vs macUSB: catalog facts
Caligula	macUSB
Free Free and open source.	Free Downloaded from GitHub releases or Homebrew, with an optional support link.
macOS, Linux, Command line	macOS
Interactive terminal interface instead of raw dd commands Progress display while writing	Downloads official macOS installers from Apple inside the app Handles legacy macOS installers on Apple Silicon
No graphical interface No Windows support indicated	macOS only, and requires macOS 14.6 or newer Licence of the published source is not stated in the research
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.