ARPwARP 7.4 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally produced by European Molecular Biology Laboratory. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The application relates to Education Tools. The most popular version among the application users is 7.4.
From the developer:
ARP/wARP is a crystallographic macromolecular model building application. ARP/wARP combines pattern recognition-based interpretation of an electron density, its modelling as a hybrid model and a maximum likelihood pa- rameter refinement with REFMAC. You can build proteins, RNA/DNA, secondary structure, side chains, loops, solvent and ligands.
You may want to check out more software for Mac, such as Trapcode Particular, Xfoil or DesignWorks Professional, which might be similar to ARPwARP.