Installing Command Line Tools on Mac OS X 10.11 El Capitan The Mac Tutorial Simply Indicate How-to Download and Install the Command Line Developer Tools for Xcode on Mac OS X 10.11 El Capitan Unix/BSD Desktop. The Command Line Developer Tools enables UNIX-style development via Terminal by installing command line developer tools, as well as Mac OS X SDK frameworks and headers. Many useful Tools are included in the Command Line Tools for Xcode, such Apple LLVM compiler, linker, and make. If you use Xcode, these tools are also embedded within the Xcode IDE. Login or Register on the Apple …