- Joined
- Feb 7, 2012
- Messages
- 296
- Motherboard
- Gigabyte Z390 Designare
- CPU
- i7-9700K
- Graphics
- Vega 56
- Mac
- Mobile Phone
If the new "partition" is also going to be an APFS filesystem then it's better to select the "Container Disk" and choose Edit --> Add APFS Volume. It will mount as another disk and can be backed up separately. The nice thing about APFS Volumes is that they can grow dynamically as space is needed. So on your 1TB NVMe SSD, for example, it's not necessary to chop it into fixed-size partitions. Instead, create another APFS Volume and give it an initial size and optionally a maximum size. This is the most efficient way to use up the large disk.
If a physical disk (1TB NVMe SSD) has multiple APFS Volumes and one of those volumes is the boot volume, then to either (a) restore the boot volume from a backup or (b) erase and reinstall macOS on the boot volume, you would only select the boot volume.
To restore from a backup:
To erase and reinstall macOS:
- Boot from backup disk
- Run Carbon Copy Cloner
- CCC will show all of the volumes you created on the NVMe SSD. These will appear on the left sidebar of CCC.
- Select the boot volume on the Backup disk as the SOURCE
- Select the boot volume on the original disk as the DESTINATION
- CCC will then restore the selected volume from Backup disk to original disk.
- After launching macOS Installer, run Disk Utility from within the Installer
- Select just the boot volume name and click Erase.
- Only 2 options will be shown:
- Name
- Format
- Click "Erase" to erase just the selected volume.
- Then install macOS on that volume
Amazing, thank you. Will create an APFS volume which thanks to you, I can now even backup separately externally via TimeMachine as it's considered a 'separate' drive!