OSX 10.6.8?? Are you sure? That is incredibly old - I haven’t seen such a 
system in quite some time.


> On Feb 17, 2015, at 8:04 AM, Tarandeep Kalra <taranka...@gmail.com> wrote:
> 
> Hello friends, 
> 
> I am using mpi for the first time on my MAC OSX (10.6.8). The MPI that I 
> installed is Open MPI. I have installed it through homebrew. It is installed 
> as I can autocomplete mpi--- commands from my terminal. 
> 
> When i run mpirun --version
> It returns to 
> mpirun (Open MPI) 1.8.4
> 
> However, when I am using the mpirun command to run a basic code like to print 
> hello with 2 cores. It does not show any error message and nothing is 
> displayed after the command is run. To simplify the problem I tried "mpirun 
> uname" to check if even 1 core responds. This also does not respond.
> 
> Thank you for helping me on this.
> Taran
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