CCC is an advanced backup and file copying utility for the Mac.
- macOS 10.15 Catalina
- macOS 11 Big Sur
- CCC is a native application on both Intel and Apple Silicon Macs (i.e. a "Universal" application)
Older versions of CCC are still available for users running older OSes. Note that these older versions are not actively being developed and support is provided on a case-by-case basis.
- An APFS formatted volume is required for a backup of of the macOS startup disk
- SSDs and hard disk drives1 in Firewire2, Thunderbolt and USB enclosures3
- CCC is supported only on Apple Macintoshes that officially support macOS Catalina (or higher)
- A minimum screen resolution of 1024x768 is required
1: APFS performs poorly on HDDs with a rotational speed of less than 7200RPM
2: macOS does not support booting a Mac via a FireWire-attached device
3: Not all hard drive enclosures are capable of booting macOS. See the Preparing your destination disk for a backup or restore and External Boot Troubleshooting sections of the CCC documentation for more information on disk formatting, partitioning, and general bootability concerns. These restrictions apply to the ability of the device to boot a Mac, any of these devices are suitable for general backup.
- CCC will not back up to or from an unformatted or unmounted device — the source and destination must have a filesystem recognized by macOS and visible in the Finder
- Copying Windows system files is not a supported configuration
- CCC will not backup directly to optical media (e.g. CD-ROM or DVD-ROM)
- WebDAV, FTP, NFS and other "cloud" destinations are not supported
- macOS cannot boot from a RAID device
- CCC is not a two-way synchronization solution designed to keep two Macs in sync with each other — this is not a supported configuration.
- Performing mass deployments with CCC is not supported. Apple discourages this sort of deployment and offers additional resources here, and there are alternative solutions to consider.
- We can only support copying versions of macOS that are supported by Apple on your hardware. For example, we cannot help you get Catalina running on a 2008 MacPro. Likewise, you cannot restore Mojave onto a 2019 MacBook Pro that shipped with Catalina. If Apple doesn't support it, we cannot support it.
- CCC can copy virtual machine container files, but copying to or from a virtual machine is not supportable.