Xcode Command Line Tools can be installed as a side effect of running git --version in Terminal without Git installed. You will be prompted to install the tools as a requirement for running Git. Apple ships a binary of git with the Command Line tools. This is confirmed on the Git for Mac Download page. This seems like a valid option considering that Homebrew requires the Command Line tools to install Git as well according to another SO post. Otherwise, the previous answers are the most direct methods of install the tools.

“非官方”链接也可在

http://developer.apple.com/downloads/

403:禁止，除非使用合格的开发人员帐户登录。免费帐户可以访问除预发布软件和完整的操作系统安装之外的所有内容。特别是，与Xcode 4.4发布一致的命令行工具包(“2012年7月”软件包)在7月27日发布，用于Lion和Mountain Lion。

与日志文件、深度链接网页和Xcode首选项窗口不同，这个页面还链接到许多其他有用的下载，免费和付费开发者都可以下载，包括所有从Xcode中解绑定的东西(音频工具、辅助工具等)、OS X内核调试构建，以及Xcode 1.0版本的发布版本。

如何获得安装在Xcode 4.4 / Mac OS X v10.8 (Mountain Lion)或更高版本的命令行构建工具?

对于OS X 10.9，你只需安装Xcode。命令行工具与Xcode捆绑在一起。技术说明TN2339，从命令行构建Xcode常见问题解答:

在OS X 10.9版本的Xcode中，无法下载命令行工具。如何在我的机器上安装它们?

In OS X 10.9, the Downloads pane of Xcode Preferences does not support downloading command-line tools. Use any of the following methods to install command-line tools on your system: If Xcode is installed on your machine, then there is no need to install them. Xcode comes bundled with all your command-line tools. OS X 10.9 includes shims or wrapper executables. These shims, installed in /usr/bin, can map any tool included in /usr/bin to the corresponding one inside Xcode. xcrun is one of such shims, which allows you to find or run any tool inside Xcode from the command line. Use it to invoke any tool within Xcode from the command line. ...

更新:在Lion 10.7.4中，命令行工具已经在XCode中可用。你可以从App Store免费获得。

GCC for OSX不会编译从macports获得的一些包。 https://github.com/kennethreitz/osx-gcc-installer/downloads

Xcode命令行工具可以从这里下载:https://developer.apple.com/downloads/index.action#

2014年4月版直接下载链接(适合想马上上手的开发人员) https://developer.apple.com/downloads/download.action?path=Developer_Tools/command_line_tools_os_x_mavericks_for_xcode__april_2014/command_line_tools_for_osx_mavericks_april_2014.dmg

Xcode Command Line Tools can be installed as a side effect of running git --version in Terminal without Git installed. You will be prompted to install the tools as a requirement for running Git. Apple ships a binary of git with the Command Line tools. This is confirmed on the Git for Mac Download page. This seems like a valid option considering that Homebrew requires the Command Line tools to install Git as well according to another SO post. Otherwise, the previous answers are the most direct methods of install the tools.