安裝git時使用macports，卻發現出現問題：
Warning: The Command Line Tools for Xcode don’t appear to be installed; most ports will likely fail to build.
後來發現是xcode還沒install Command Line Tools
– Open Xcode
– Click on Xcode menu and then Preferences
– Locate the Download icon and then the Components tab
– Click on Command Line Tools and then the Install button.
有180MB……