OS X is an Open Brand UNIX 03 Registered Product since Leopard and given this it can be considered "complete." It isn't shipped with a compiler but your can ins

OS X is an Open Brand UNIX 03 Registered Product since Leopard and given this it can be considered "complete." It isn't shipped with a compiler but your can install the cmdline tools (without all the XCode bundle) typing: xcode-select --install on (Mavericks) Terminal.