Unable to run bash (OSX 10.10.5).

Using `2.26.4` on `OSX 10.10.5`, I can't run a simple bash script. Using `Run:File` I get:

```
Unable to run

bash
Is it in your PATH?
```

I've confirmed that `bash` _is_ in fact in my **PATH**.

Also note that trying to run a `sh` script (`#!/bin/sh`) is no better.

Thanks in advance for any pointers!