我正在尝试在Mac 10.9.1上安装PIL我收到一条错误消息，我无法在这里找到。我已经安装了Python27，pip，DJango，现在我尝试安装：
sudo pip install pil
我收到的消息：
Downloading/unpacking PIL
Could not find any downloads that satisfy the requirement PIL
Some externally hosted files were ignored (use --allow-external PIL to allow).
Cleaning up...
No distributions at all found for PIL
Storing debug log for failure in /Users/xxx/Library/Logs/pip.log
有人知道如何解决此错误吗？
在Xcode上我已经检查过是否安装了命令行工具但它没有出现在Xcode-＆gt; preferences-＆gt;下载。
非常感谢你的帮助