For installation, please see https://www.phenix-online.org/documentation/tutorials/cryo_fit_install.html
Ubuntu: version 14.04 LTS, version 16.04 MacOS: version 10.13.5, 10.12.6, 10.11.6 CentOS: version 7.0 Ubuntu is more recommended than Centos. Centos doesn't work for GUI, it doesn't show CC values as well. - Forcefield (in .../gromacs-4.5.5_cryo_fit/share/gromacs/top/amber03.ff) is actually amber03_DDB_gdp_MIA_SEP.ff 05/15/2018: confirmed to install and run well at macOS, CentOS and Ubuntu 03/2018: transition from cryoFIT to cryo_fit 02/16/2018: confirmed to run well at Ubuntu (version 14.04 LTS). 11/29/2017: transition from cryo_fit to cryoFIT 11/01/2017: confirmed to run well at Ubuntu (version 16.04, "sparky"). Centos is fine, but Ubuntu is more recommended since it shows cc values for sure. 10/18/2017: confirmed to run well at MacOS (version 10.11.6, both commandline and GUI), CentOS (version 7.0, "kaguya", both commandline and GUI)