Running First Aid on â  Macintosh HD - Dataâ   (disk1s1)

Verifying the startup volume will cause this computer to stop responding.

Verifying file system.
Volume could not be unmounted.
Using live mode.
Performing fsck_apfs -n -l -x /dev/rdisk1s1
Checking the container superblock.
Checking the checkpoint with transaction ID 14373509.
Checking the EFI jumpstart record.
Checking the space manager.
Checking the space manager free queue trees.
Checking the object map.
Checking the encryption key structures.
Checking volume /dev/rdisk1s1.
Checking the APFS volume superblock.
The volume Macintosh HD - Data was formatted by newfs_apfs (945.200.129.100.1) and last modified by apfs_kext (1934.141.2).
Checking the object map.
Checking the snapshot metadata tree.
Checking the snapshot metadata.
Checking the document ID tree.
Checking the fsroot tree.
error: refcnt (1) of dstream id object (id 9661729) is less than expected (2)
Checking the extent ref tree.
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (47552239 + 8)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (47562552 + 4)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (47564438 + 4)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (47566238 + 4)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (87255157 + 4)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (96241588 + 2)
warning: mismatch between extentref entry reference count (1) and calculated fsroot entry reference count (0) for extent (96260747 + 4)
Verifying volume object map space.
The volume /dev/rdisk1s1 was found to be corrupt and needs to be repaired.
Verifying allocated space.
Performing deferred repairs.
error: Unable to perform deferred repairs without full space verification
error: Try running fsck against the entire APFS container instead of a volume
The volume /dev/rdisk1s1 could not be verified completely.
File system check exit code is 8.
Restoring the original state found as mounted.
File system verify or repair failed. : (-69845)

Operation successful.