How to Highlight a Symbolic Link in Finder of El Capitan? You cannot do the highlight in Finder of El Capitan 10.11.4. 
However, there may be other methods to do it. 



How can you highlight a symbolic link in Finder of El Capitan?
Set your highlight on the original, the symlink will follow - even across different drives on the same machine, even across different machines, so long as they are able to see each other.

Note: Sometimes the changes are not visible immediately to the Finder. Any change to the folder is usually enough to 'remind' it.