Mac OS X systems come with a backup program named Time Machine, which can be found in the Applications folder. If you attach an external drive to the system and configure Time Machine to use it, the program will backup the system automatically and maintain the following backups:
- Hourly backups for the past 24 hours
- Daily backups for the past month
- Weekly backups for all previous months
The app will delete the oldest backups when the backup drive becomes full.
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