The 2.1.2 version of Atomify for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X was originally created by 2.1.2. The program lies within Education Tools, more precisely Science.
From the developer:
Atomify makes molecular dynamics easier. LAMMPS is a classical molecular dynamics code that models an ensemble of particles in a liquid, solid, or gaseous state. Atomify is a high performance live visualizer for LAMMPS simulations, with stunning graphics able to simulate and render more than 250000 atoms with excellent frame rate on modern hardware.
You may want to check out more Mac applications, such as iRNAi, Gee or Arcade Math Blocks, which might be similar to Atomify.