Is it impossible to delete/move a file named "␀" on mac?
Solution 1:
You can attempt to remove the file by its inode number. List the files in /Library
with the -i option
ls -il /Library
The first column is the inode number of the file. Then use find
find /Library -inum XXXXXXX -delete
where XXXXXX is the inode number of the file.
Solution 2:
This seems to be a 10.11 only problem, so it's impossible to delete on 10.11 at least, but you can very likely delete this on any OS X version other than 10.11, (I tried 10.4 and 10.10, and I could delete files with this character).