I'm following Michael Hartl's Rails tutorial, so far I've installed Git 1.7.5.4 x86\_64 (I'm running OSX 10.5.8) and I'm trying to install rvm

After I run the following: 

`$ curl -kL get.rvm.io | bash -s stable`

I get: 

```
BASH 3.2.25 required (you have 3.2.17(1)-release)

```

I've tried changing the shell, using `chsh -s /opt/local/bin/bash` but I get `shell '/opt/local/bin/bash' does not exist`

Not sure where to go from here but I'd appreciate any guidance. Thanks!