Google results for the less restrictive unquoted version of the query largely result in completely unrelated results the few related results are duplicates of the previously described seven results, or results that talk about the inner workings of APFS and the new sealed volume feature which, described next. Currently a Google search for "The source volume cannot be restored because it has a broken seal" results in only seven results (two are broken links, two are not applicable, two are from when macOS Big Sur (macOS 11) was in beta, and only describe the problem, and one is a copy of another result). 
macOS Big Sur (v11.1 build 20C69) This was originally something like v11.0.1 installed to a fresh drive about November or December 2020 (two to three months ago) to a freshly wiped SSD. created a disk image of the disk and attempted to restore the disk image as the source (other issue described under research effort below). created a disk image of the APFS Container and attempted to restore with the disk image as the source (other issue described under research effort below). attempted to create a disk image of the volume, so I could attempt to restore with the disk image as the source (other issue described under research effort below). 
used Apple Software Restore command sudo asr restore -source /dev/disk1 -target /dev/disk5 -erase where disk1 is the source APFS Container and disk5 is the destination APFS container (same issue).used another computer, a MacBook Air, (same issue).switching the source to be connected via Thunderbolt and the target as the internal drive (same issue).booted from a third SSD with a full fresh install of (same issue).(OSStatus error 22.)Ĭsrutil authenticated-root status returns: Authenticated Root status: enabled which suggest that the volume is currently properly sealed.
The source volume cannot be restored because it has a broken sealĬould not validate source - Invalid argument Disk Utility's log: Restoring “Container disk5” from “Macintosh HD” The target is a Thunderbolt-connected SSD. The source is the internal SSD in a 2013 Mac Pro. A description of my research effort is at the end of this post.ĭisk Utility will not restore an APFS volume "because it has a broken seal," but the volume appears to be sealed. I have been researching this for many hours over the last week.
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