$ sysctl -a | grep acl
kern.features.ufs_acl: 1
vfs.acl_nfs4_old_semantics: 0
$ mount
/dev/ada0p2 on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
devfs on /var/named/dev (devfs, local, multilabel)
$ setfacl -m u:spamd:rwX ham
setfacl: ham: acl_get_file() failed: Operation not supported
$ getfacl ham
# file: ham
# owner: spamd
# group: spamd
user::rwx
group::r-x
other::r-x
Any attempts to set acls with setfacl gives the same error, even commands copied directly from the man page.