This versions of GiD works on Mac OS X 10.9 Mavericks, 10.10 Yosemite or 10.11 El Capitan, x64 operating system.
Developer versions of GiD are more modern versions of the program that have new capabilities. They have not passed the validation tests that a official version does. So, use them with care. Only download and install one of these versions if you know of a new capability very important for your needs or if you want to try the new improvements in the program.