Clang in OSX does not support OpenMP by default, so it could not compile JtR with OpenMP without another installation of Clang.
However, after seeing the option below, I wonder what the difference is compared to OpenMP mode:
--fork = N fork N processes
If I invoke JtR using
--fork = 2, Then JTR will be executed with two processes, executed in different nuclei of physical processors (same as OpenMP)?