If you must have access to /usr
from the finder, probably the easiest way is to create a symbolic link to it. From a terminal session shell and using usrlink
as an "alias":
sudo ln -s /usr /usrlink
sudo chmod -h 755 /usrlink
Then you should be able to see see the directories under /usr
(which is filtered by the Finder) under /usrlink
(which is not). But I really don't recommend doing this. It's too easy to mess /usr
up inadvertently and, if you do, you're probably going to have to reinstall OS X. Also, .
files will still be hidden without changing other preferences.