https://ftp.pmel.noaa.gov/ferret/pub/osx_intel/previous_versions
├── [ 29 Jul 23 2012] fer_environment.v63.tar.gz
├── [ 30 Jul 23 2012] fer_environment.v681.tar.gz
├── [ 45 Jul 5 2016] fer_environment.v7.tar.gz
├── [ 29 Jul 23 2012] fer_executables.v63.tar.gz
├── [ 30 Jul 23 2012] fer_executables.v681.tar.gz
└── [ 45 Jul 5 2016] fer_executables.v7.tar.gz
0 directories, 6 files