$ git clone https://github.com/osorioabel/XcodeDuskThemes.git
$ cd XcodeDuskThemes
$ chmod +x install.sh
$ ./install.sh # And then restart Xcode
$ git clone https://github.com/osorioabel/XcodeDuskThemes.git
$ cd XcodeDuskThemes
$ mkdir -p ~/Library/Developer/Xcode/UserData/FontAndColorThemes/
$ cp *.dvtcolortheme ~/Library/Developer/Xcode/UserData/FontAndColorThemes/