The article mentions the Postgres installer, but mostly assumes the reader uses Homebrew (MacPorts is mentioned at the bottom as well). I have no way to get rea

The article mentions the Postgres installer, but mostly assumes the reader uses Homebrew (MacPorts is mentioned at the bottom as well). I have no way to get real numbers, but given Homebrew's overall popularity on Github, I suspect that assumption is a good bet for a very large number of Rails developers on OSX. Once you choose a package manager, it tends to be easier to always use that, rather than use one-off binary installers. (In fact, the one-off binary installers can lead to known permissions problems when it comes to Homebrew specifically.)