Mac GUI and CLI Builds - 64 and 32 Bit Builds Please make sure to download the "GUI" (Graphical User Interface) unless you specifically want the CLI (Command Line interface) build. 64 Bit builds It is recommended that you download the 64bit ("x86_64") builds if you have a capable mac. Any Mac with a Core 2, Core i5/i7 based CPU will be able to run the 64bit builds. Requirements: Mac OS X 10.5