Please, would be possible to update the convmv pkg to the last version (2.05)? This 2.05 version is the current version in FreeBSD: https://www.freshports.org/converters/convmv/
I'm experimenting some problems that this version resolves, from its change log:
- allow NFC/NFD conversion on APFS volumes, add man page section for that filesystem
This problem do not happens only with APFS volumes, it's happening to me in FreeNAS, with zfs volume withthe property "normalization=formD" shared via NFS, and a macOS client.