An Apple File System bug has been discovered in macOS 10.15.5 Catalina that can prevent users from making a bootable clone of their system drive, according to the creator of Carbon Copy Cloner.
In a blog post on Wednesday, software developer Mike Bombich explained that the CCC team had uncovered the issue in the Apple File System, or APFS, when attempting to create a bootable backup in a beta version of macOS 10.15.5.
According to Bombich, the bug prevents CCC from using its own file copier to establish an initial bootable backup of a macOS Catalina System volume.
Read more at MacRumors.com