Installing R on Mac OS X

1) Install Homebrew in your system.

2) Download and install XQuartz (Homebrew does not package XQuartz and it is needed for step 3. Therefore install XQuartz.)

3) Install Fortran and R.

heshans@15mbp-08077:/tmp$ brew update

heshans@15mbp-08077:/tmp$ brew tap homebrew/science

heshans@15mbp-08077:/tmp$ brew install gfortran r 

4) Verify the installation by running R.

heshans@15mbp-08077:/tmp$ R

R version 3.0.3 (2014-03-06) -- "Warm Puppy"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin13.1.0 (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.