I’m using Macbook air M2. I downloaded the latest version of fluka which is ‘fluka-4-4.0.arm-Darwin-gfor12.tar’.
gfortran version is
gfortran --version
GNU Fortran (MacPorts gcc12 12.3.0_4+stdlib_flag) 12.3.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I’m not entirely sure whether the issue was resolved by creating a gfortran link or installing the neutron library, but the good news is, Fluka can now run by using both the command line and Flair.