A bootable clone or Time Machine: which backup suits which problem
Two different jobs sold as one category. What each protects you from, what each costs, and why many people want both.
These are often compared as if they were competing products. They protect against different failures, and the useful question is which failure you are worried about rather than which product is better.
What each one is for
| Time Machine | Carbon Copy Cloner | |
|---|---|---|
| Protects against | Deleting a file, needing an old version | Drive failure, needing to work today |
| Restores | Individual files, or a whole Mac | A working copy you can boot or migrate from |
| History | Hourly, then daily, then weekly | Optional, with snapshots |
| Cost | Included | $49.99, household licence |
| Effort | Set once, forget | Schedule and verify |
The case for Time Machine
It is free, it is built in, and versioned history is what most people actually need, because the common disaster is an overwritten document rather than a dead drive. It also integrates with Migration Assistant, which makes moving to a new Mac straightforward.
The case for a clone
A clone answers a specific question: if this Mac died this morning, could I keep working today? For anyone whose work depends on the machine, that is worth more than history. Modern macOS has made bootable clones more complicated because of the sealed system volume, so the practical value is a fast, complete data restore rather than booting the copy itself.
Why many people run both
- Time Machine to an always connected drive, for history and accidental deletions.
- A clone to a second drive weekly, for a fast recovery from hardware failure.
- An offsite or cloud copy of the irreplaceable things, for theft and fire.
- Verification of all three occasionally, since an unverified backup is not a backup.
What this means for storage
Backup destinations fill up, and both tools handle that differently: Time Machine thins its own history, while a clone is a mirror and needs a drive at least as large as the data. Excluding rebuildable folders from both is the same list either way, and it is in backing up a full Mac.
Common questions
Should I use Time Machine or Carbon Copy Cloner?
Time Machine for versioned history and accidental deletions, which is the common case. A clone for fast recovery from hardware failure. Many people run both, since they protect against different problems.
How much does Carbon Copy Cloner cost?
US$49.99 for version 7, a personal and household licence valid on all computers in your household, checked in September 2026. It also works with versions 5 and 6, and requires macOS Ventura or greater.
Are bootable clones still possible on modern macOS?
They are more complicated because the system volume is sealed and signed. In practice the value of a clone now is a fast complete data restore rather than booting from the copy itself.
Do I need a backup if I use iCloud?
Yes. Syncing is not backup: deleting a file syncs the deletion everywhere. A backup keeps versions and copies that a sync service deliberately does not.