Downloading the installer is a fairly straight forward process:
curl -sL https://raw.github.com/TheBastionBot/BastionScripts/master/darwin/brew.sh -o BastionInstaller.sh && chmod +x BastionInstaller.sh
This will download the installer into the current directory.
To start the installation process, simply run the installer:
Wait for a few moments, so that it can download and install everything you will need to run Bastion smoothly. Meanwhile, you can go grab a cup of coffee (or tea, if you prefer that).
Once it is done, it will let you know.
Now, you will have a directory named
Bastion, in your
HOME directory, where Bastion is installed.