Until Apple releases a patch it's a fairly pointless exercise running that command - your bash is a vulnerable version. But as mentioned unless you're specifically allowing remote access it's not a problem.
Unfortunately a variation of the vulnerability has surfaced that needs additional patching. You might be patched for the first but not the second:
$ rm -f echo
$ env X='() { (a)=>\' sh -c "echo date"; cat echo
sh: X: line 1: syntax error near unexpected token `='
sh: X: line 1: `' sh: error importing function definition for `X'
Thu 25 Sep 2014 08:50:18 BST
The above output is an example of a vulnerable bash version. If you see a date in the output of that command your bash is vulnerable.