I'm setting up a new dev Macbook Pro, and trying to replace bash with zsh. I installed zsh and can run it to change shell in a session. When I use sudo chsh -s /bin/zsh username I get the error message: chsh: Operation was denied because the current credentials do not have the appropriate privileges. Operation was denied because the current credentials do not have the appropriate privileges. AFAIK I have admin privileges on the machine. What could be causing this?