The installer should auto download a few seconds after the page loads. The download functionality differs between browsers. The image below is from Chrome.

Click on the arrow next to the download and choose "Show in Finder".

Open DMG

Double click the DMG file to open it. A window should pop up that contains the PKG installer file.

If not the DMG may appear as a disk image in Finder, like the image below. Click on this to find the installer PKG file and the installation readme.

Run the installer

Double click the bcs_mac.pkg file to start the installation process.

Complete

Follow the installer prompts to completion. The BCS runs in the background, there will be no user interface.

To ensure the BCS installed correctly and is running click here.

If all is well a green Successful message should appear on the page.