You have to see the development section in the Gretl website. Usually we get the CVS file tree and use Linux and GNU C compiler commands to make Gretl. Inside MacOS X you should set up the environment to compile just like in Linux. The Xcode suite includes a modified version of the GNU Compiler Collection as well as, in Xcode 3.1 and later, the llvm-gcc compiler, with front ends from the GNU Compiler Collection and a code generator based on LLVM,[3], and, in Xcode 3.2 and later, Apple's LLVM Compiler, with the clang front end and a code generator based on LLVM, and the Clang Static Analyzer.... So, you need to download the CVS file tree, or at least the required files for libgretl (compiled for MacOS X). (I don't have access to a Mac) Good luck, Helio On Fri, Jun 22, 2012 at 4:48 AM, Sanzad Siddique <pavelkushtia(a)gmail.com&gt; wrote: