![]() If everything worked, we'll go back into Disk Utility and reformat the internal hard drive to "APFS" (case-insensitive!). This should usually be the case, since the backup programs check the data after the backup has been created. In the next step, we boot the Mac from the external hard drive (press and hold the "ALT" key during system startup until a selection appears) and see if all the important data is still there. Then the software copies a bootable backup from the system hard drive to the external hard drive. ![]() If that doesn't work right away, there is here are instructions. The external hard drive comes with the Disk Utility first formatted to the "APFS" format (without upper and lower case!), because the disks are usually delivered by the manufacturer in ExFAT format. ![]() The solution is: an external hard drive and a Backup program like SuperDuper or Carbon Copy Cloner to use. Now how do you get the boot volume on APFS without the case sensitive option without doing a complete rebuild? Conversion to APFS with backup software I've often wondered what the "upper and lower case" option is for, but so far for "security reasons" I've only ever used the normal HFS+ and APFS variants when formatting the hard drives, since Apple itself sets them to used by the Macs they ship. ![]() With which file system does Apple deliver the Macs?
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