The Kicad devs have packaged precompiled binaries for OS X, and they are available here.
They are nightly builds, generally considered “bleeding edge,” but they will typically run well.
The main .dmg contains the application and schematic libraries, and assumes you will use github to pull footprints. The -extras .dmg contains the footprint libraries so you can install them locally. You should probably install them locally.
At some point they will decide that something is a stable release.