These steps will guide you through the process of installing Phalcon Developer Tools for OS/X. 预备知识（Prerequisites） The Phalcon PHP extension is required to run Phalcon Tools. If you haven’t installed it yet, please see the Installation section for instructions. 下载（Download） You can download a cross platform package containing the developer tools from the Download section. You can also clone it from Github. Open the terminal application:  Copy & Paste the commands below in your terminal: ~~~ git clone git://github.com/phalcon/phalcon-devtools.git ~~~ Then enter the folder where the tools were cloned and execute ”. ./phalcon.sh”, (don’t forget the dot at beginning of the command): ~~~ cd phalcon-devtools/ . ./phalcon.sh ~~~ In the terminal window, type the following commands to create a symbolic link to the phalcon.php script: ~~~ ln -s ~/phalcon-tools/phalcon.php ~/phalcon-tools/phalcon chmod +x ~/phalcon-tools/phalcon ~~~ Type the command “phalcon” and you will see something like this:  Congratulations you now have Phalcon tools installed!