Time Machine
TIME MACHINE is the built-in backup utility of macOS. When paired with an external drive, it automatically backs up every file on your Mac. These backups are incremental, meaning that only files changed since Time Machine was last run are saved. This avoids unnecessary duplication of data on the external drive but also means your very first backup may take several hours, as every file needs to be copied.
Space permitting, backups are run hourly, and these are then amalgamated into a daily backup which is stored for a month. Daily backups are then collected
