The package is installed. The Terminal window that just opened is downloading Mili's components and starting it — wait for Mili is installed there, then open https://localhost:5001.
If no window opened, run: ~/Library/Application\ Support/Mili/installer/run-install.command
Le paquet est installé. La fenêtre Terminal télécharge les composants de Mili et le démarre — attendez Mili is installed, puis ouvrez https://localhost:5001.