I downloaded the following:

http://emacsformacosx.com/emacs-builds/Emacs-pretest-24.3.92-universal.dmg

Simply mount the disk image (by double-clicking on it) and open the file "Emacs.app/Contents/MacOS/Emacs".

Unlike earlier releases, the "Built on" field is marked as "Multi". This might be something that "emacsforosx.com" has added to the installation, although I find it unlikely, as they typically provide clean Emacs installations.

    -- Anders

On Sun, Jul 20, 2014 at 10:16 AM, Glenn Morris <rgm@gnu.org> wrote:
Anders Lindgren wrote:

> In the latest pretest, the OS X application bundle provide a number of
> different binaries built for different architectures and operating system
> versions, e.g. "Emacs-powerpc-10.4". To pick which binary to use, a Ruby
> dispatcher script is used, it's named "Emacs.app/Contents/MacOS/Emacs".

I really don't think it does.
Please provide the details of where you got this from.