Cannot change bash shell in Mac OS X

Question

I'm trying to update bash shell on my Mac OS Mavericks.

$ brew install bash
$ which -a bash
/bin/bash
/usr/local/bin/bash

$ which bash
/bin/bash

$ chsh -s /usr/local/bin/bash
$ which bash
/bin/bash

In Terminal's preference: Shells open with -> Command (complete path) : /usr/local/bin/bash.

But still, I cannot switch to brew-installed bash shell. What can I do?

Solution

From the chsh manual:

When altering a login shell, and not the super-user, the user may not change from a non-standard shell or to a non-standard shell. Non-standard is defined as a shell not found in /etc/shells.

So you can either run chsh as root

sudo chsh -s /usr/local/bin/bash "$USER"

or add /usr/local/bin/bash to /etc/shells to make it a "standard shell"

echo /usr/local/bin/bash | sudo tee -a /etc/shells
chsh -s /usr/local/bin/bash

Note that the fact that which bash still points to /bin/bash does not mean your shell has not been changed, it just means /bin is before /usr/local/bin in your $PATH.