Wmacos-resource-fork-file-in-package
The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
There is a file in the package with a name starting with
._, the file name pattern used by Mac OS X to store resource
forks in non-native file systems. Such files are generally useless in
Debian packages and were usually accidentally included by copying
complete directories from the source tarball.
Visibility: warning
Check: foreign-operating-systems