I was under the impression that DW was, as yet, incompatible with Sierra. At any rate, that is no longer the case...
Apparently, DW has (recently?) been verified by Alsoft
as being compatible with Sierra:
DiskWarrior 5 supports any locally connected Mac OS Standard (HFS) or Mac OS Extended (HFS Plus) disk including Fusion Drives, RAID volumes, journaled disks, case-sensitive disks, FileVaults and Time Machine backups. DiskWarrior 5 supports both PowerPC and Intel Macs started in OS X 10.5.8 through 10.12
". Edit - Originally a reply to Re: macOS Sierra, this post and the follow-ups were moved to a separate thread.