Time Machine is an automatic backup program announced on August 7, 2006 by Apple Computer. during the Worldwide Developers Conference. The program is included with the new version of Mac OS X 10.5 Leopard.

Time Machine creates copies of each file so that user if the file should be overwritten or deleted the user can return to the previous version. The program can recover the previous version of a single file or groups of files. Time Machine does not work only with files in the Finder but is able to recover previous versions of programs. The programme for example is able to recover deleted photo albums from iPhoto or tabs erased from your Address Book. The program makes a backup of changed files every hour for the last 24 hours. Of the backup older than a day is maintained only for a day in order not to unnecessarily occupy space. Then the user can have access to the changes during the day with an hour or steps over the previous period with the pace of a backup per day. When the system ends disk space the program will remove backups older. Time machine allows you to recover the entire operating system and not just files. So if the user may want to use the program to restore the entire computer to the state in a backup or to migrate the system on a new Apple computers.