Error compiling for board Arduino Uno
loading libs from /Users/erinshankland/Documents/Arduino/libraries: reading dir 
  /Users/erinshankland/Documents/Arduino/libraries: open 
  /Users/erinshankland/Documents/Arduino/libraries: operation not permitted


This is not an Arduino problem but an OS problem.

Either your /Users/erinshankland/Documents/Arduino/libraries is not accessible by your user (check the permissions) or it's not a directory.

You can try, from a terminal:

sudo chown -R erinshankland /Users/erinshankland/Documents/Arduino/libraries
chmod -R 755 /Users/erinshankland/Documents/Arduino/libraries


which will reset ownership and file permissions on the directory and everything underneath it.

If not, then delete your libraries folder (which may in fact be a file, not a folder) and recreate it and repopulate it with your desired libraries.