This document discusses Time Machine, a backup tool for Macs. It allows users to back up their entire Mac, including files, applications, and system files, to an internal or external hard drive. Backups can also be stored on another Mac on the same network. Time Machine creates regular backups and allows users to restore old versions of files. While it provides automatic backups, some recommend also using a third-party cloning tool to allow creating bootable backups as a secondary backup strategy. The document analyzes different cloning tools and recommends Stellar Drive Clone as it allows creating bootable clones with advanced features.