Time Machine is a backup software application distributed with the Apple macOS computer operating system. The software is designed to work with AirPort Time Capsule as well as many other internal and external hard disk drives. It was introduced with Mac OS X Leopard (10.5) and continues to be a key feature in subsequent macOS releases.
Time Machine creates incremental backups of files that can be restored at a later date. It allows the user to restore the whole system, multiple files, or a single file to different points in time, effectively allowing the user to “travel back” and recover lost or deleted files.