I have a backup created by another application or an older version of CCC. Can CCC update my existing backup?

Product: 
ccc6

CCC always examines the files on the destination to determine if they already match those on the source. If you have a volume that is virtually identical to your source, CCC will copy only the items that are different between the two volumes.

Frequently asked questions about the CCC SafetyNet folder

Product: 
ccc6

Note: The topics in this article are not relevant to APFS-formatted destination volumes that have CCC snapshot support enabled. For those volumes, CCC leverages snapshots to implement the SafetyNet functionality, and the snapshots aren't affected by any of the shortcomings described here.

I have a full-volume backup in a folder or a disk image, but I don't have a bootable backup. How can I restore everything?

Product: 
ccc6

CCC makes bootable backups specifically to avoid this kind of situation. When you have a bootable backup, you simply boot from that, then restore everything to a replacement disk or the original disk. One step, minimal time, couldn't be easier. Occasionally people get into this sticky situation though -- I have a backup of everything in a disk image or in a folder on the backup volume, there's a clean installation of macOS on my replacement disk, now how do I get everything back to the way that it was before?

Frequently Asked Questions about encrypting the backup volume

Can I run a backup while I'm using my computer? If I have open files, will they be backed up?

Product: 
ccc6

Generally, yes. Performance will be affected during the backup task (especially the first one) as CCC reads the entire source volume and writes to the destination volume. If your work is "disk bound" — that is your applications are reading or writing to either the source or destination, then you'll notice a performance hit. If you're just reading email or writing a document, then you probably won't notice the performance hit.

Questions fréquemment posées sur CCC et macOS 11

Product: 
ccc5

En annonçant macOS Big Sur, Apple a décidé d’abandonner Mac OS X (10) et de le remplacer par macOS 11. Comme le changement de numéro l’indique, c’est l’évolution la plus importante de macOS depuis l’introduction de Mac OS X par Apple il y a une vingtaine d’années. Le système est désormais stocké sur un volume système signé, protégé par un sceau cryptographique. Ce sceau ne peut être appliqué que par Apple : les copies ordinaires du volume système ne sont pas démarrables sans le sceau Apple.

Questions fréquemment posées sur CCC et macOS Catalina

Product: 
ccc5

Si vous avez effectué la mise à niveau vers macOS Catalina, vous avez peut-être remarqué la présence d’un nouveau volume sur votre Mac : Macintosh HD - Data. Ce nouveau volume fait partie d'un groupe de volumes, un nouveau concept de macOS Catalina.

Why does CCC say that my Mac is booted from a backup volume?

Product: 
ccc5

If you boot your Mac from a backup volume, CCC will be started upon login to ask whether you'd like help restoring from that backup volume. Sometimes, though, this offer is made when you're booted from a production volume, not a backup. CCC makes this assessment based on your currently-defined backup tasks. If you used CCC to migrate from one drive to another, then the task that you used to perform that clone will still be present on your new startup disk.

L’ancien dossier SafetyNet n’est pas utilisé lorsque des instantanés sont activés sur la destination

Product: 
ccc5

SafetyNet est une fonctionnalité propre à CCC qui vise à protéger les données stockées sur vos volumes de destination. Cette fonctionnalité a été conçue principalement dans le but de protéger le contenu d’un volume qui a été sélectionné par erreur comme volume de destination. Au lieu de supprimer immédiatement le contenu de ce volume, CCC le place dans un dossier appelé « _CCC SafetyNet ». Lorsque vous vous rendez compte de l’erreur de configuration, il vous suffit de restaurer les fichiers à partir du dossier SafetyNet, puis de corriger la configuration de la tâche de sauvegarde.

System problems can lead to a failure to install CCC's helper tool

Product: 
ccc5

Configuration files for privileged helper tools are placed in the /Library/LaunchDaemons folder on your startup disk. CCC never touches this folder directly, rather it uses the macOS "Service Management" service to install and load its helper tool configuration. If the permissions or ownership of this folder are incorrect, however, the Service Management daemon (smd) will fail to install the helper tool configuration, and this service offers no recourse, nor even a notification that something is wrong that should be corrected.