Unison

Unison is a robust file synchronization tool designed for macOS, Unix, and Windows. It efficiently synchronizes file collections across different hosts or disks, allowing separate modifications before merging changes intelligently. Unlike traditional mirroring tools, Unison handles bidirectional updates, detects conflicts, and ensures data integrity without requiring superuser privileges or kernel modifications. It supports direct connections or secure SSH tunneling, optimizes bandwidth usage, and maintains resilience during network interruptions. Available under the GNU Public License, Unison provides a reliable, user-friendly solution for keeping files in sync across diverse systems.