The MAC (OSX) version of PREPRO2012 comes with OSX executables 
codes, in compressed form.
 
1) Copy MAC-OSX.tar.gz to your hard copy and uncompress and untar it.
     After installation you should have a single directory named PREPRO12
     that contains 42 files; you can then delete MAC-OSX.tar.gz.
 
2) To VERIFY proper installation, it is recommended that after installation you 
     execute VERIFY.BAT. This is a batch file that will run the codes in sequence.

3) The final two codes will display the calculated cross sections (EVALPLOT), 
    and compare the results you calculated to a standard set of results (COMPLOT).
    Difference of about 1 % to 2% are acceptable; larger differences indicate an
    installation problem.

   If plots are displayed before the batch file (VERIFY.BAT) finished, the entire
   system has been verified and is ready to use. If you do not obtain plots, there
   was an ERROR during installation; in this case 4) below.

4) If you have any problems notify the Nuclear Data Section, IAEA, Vienna, Austria.
 
    services@iaeand.iaea.or.at