Can't Install Arduino Create Agent

I download the latest at the time which was 1.2.2 .
ArduinoCreateAgent-1.2.2-osx-amd64-installer-safari.dmg
The error is - the installer doesn't install. It does nothing except warn that the download is from the internet, click OPEN and nothing happens, when it should take me through the install process.

I also started a separate topic here: