With the new Mavericks, the traditional ways that mostly one will find out via Googling in order to add a PATH to environment list of OS X, won’t work. Apple secretly moved to a folder called “path” in “etc” folder to store system paths but there is a folder called “path.d” that you can store your paths there and it will work like a charm.
So, simply create a text file, add your path inside it, save and move it to “/etc/path.d” and reboot/relogin and you are good to go.
I’ve used it to access platform tools of Android SDK but it can be used for anything.