Carbon Copy Cloner
Carbon Copy Cloner is a backup and disk cloning utility for macOS made by Bombich. History 

Carbon Copy Cloner version 1 was released on January 18, 2002. It was released as donationware until 2012, when it became shareware starting with version 3.5. In 2021, its creator, Mike Bombich, discovered that Apple silicon Macs cannot boot if the internal storage failed, even if booting from an external drive. A minimal version of the Mac OS, residing on the internal storage device, has to verify the integrity of the operating system carried on the backup device before recovery can take place. Features 
CCC's main window lets users select a source disk and a destination disk, and optionally deselect source files or folders from being copied. It supports backup scheduling. Reception 
Carbon Copy Cloner has been extensively covered in Apple-related publications, and received positive reviews. The Verge Chris Welch called it "an essential utility" for advanced users, but also said that Apple's simpler Time Machine was sufficient for most users. See also
 Disk cloning
 Apple File System

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Macintosh software
Disk cloning
Backup software for macOS