Instructions for installing gfortran on MacOSX

OSX 10.10 (Yosemite) users

Make sure you have Xcode installed. This can be downloaded from the App Store or from https://developer.apple.com/xcode/downloads/.

Open a terminal window and execute

xcode-select --install

This should have the result of installing command-line versions of all the tools you’ll need to compile C and FORTRAN code. To test it, run the installation and test scripts.

If these still don’t work, complaining about a lack of FORTRAN support, try installing gfortran as shown in the instructions below for older versions of the OS.

OSX 10.9 and older

Make sure you have Xcode installed. It is available at https://developer.apple.com/xcode/downloads/. You may need to follow the “Additional Tools” link to find an older version of Xcode.

The following is based on the instructions given on the R website.

To install gfortran in your user space in such a way that it can be easily removed later, download and run the mac-fortran.sh script from the course website by opening a terminal and executing

curl -O http://kingaa.github.io/sbied/prep/mac-fortran.sh
sh mac-fortran.sh

This will download and unpack a new version of gfortran, putting it into a new directory: ~/gfortran. It will also put a Makevars file into your ~/.R directory so that R knows where to look when it wants gfortran.

If it works, you should be able to run the installation and test scripts.