Which program installs *osxfuse* files in / (root folder)?
After some investigation, the *macfuse* files were mv'ed to root folder by a mis-configured bash script.

The script was supposed to move the *macfuse* files to somewhere else and ln from /usr/local/lib/*.macfuse*, to kill some homebrew warning. Too bad, the destination path of the script was missing and so files were mv'ed to root folder.

It's now fixed by:


rm all symbolic links of *macfuse* from /usr/local/lib/
mv *macfuse* files to a proper folder
ln each file from /usr/local/lib/