Fortran and mac

This is an Apple user to user forum. I think you need to get your instructions in a different venue. Try using Google to search for what you want.

http://hpc.sourceforge.net/

FORTRAN is not even close to Python. FORTRAN started in the days of 80 Column punched cards, and is mostly used in Scientific computing.

I do not know why you want to play with FORTRAN, but unless it is essential for work, I would suggest you consider C. C is only a little younger than FORTRAN, however, C is still widely used.

The only Apple forums that might have someone with a FORTRAN clue would be:

Developer < http://discussions.apple.com/forum.jspa?forumID=727 >
Software Development 101 < http://discussions.apple.com/forum.jspa?forumID=728 >
Unix < http://discussions.apple.com/forum.jspa?forumID=735 >

I've had a Fortran compiler installed on my Intel OS X based Mac,

My girlfriend was studying Maths/Stats in University and she had a Fortran based module, and as I'm sure you are aware, in an academic environment requiring Fortran, C is not a substitute, however more robust it may be.

I think I got my Compiler here at the time: http://gcc.gnu.org/wiki/GFortranBinaries#MacOS

You basically just type the Fortran code into a text file and compile it,

you can then execute all through command prompt, there is an Xcode plugin so you can write directly in the IDE but this I suspect, is overkill.

Hope this helps,
John