根据官方说法：OS X Command Line，是在 ~/bin 建立符号链接。

ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" ~/bin/subl

但官方还说如果装了 Macports 的话，上面办法不行，但没说该怎么办。

If you have the MacPorts version of Python installed, then starting Sublime Text 2 via the subl will not work correctly. As a workaround, start Sublime Text 2 first via Finder, and then interact with it using subl.

郁闷啊，我的办法如下

vim ~/.bash_profile

加入

alias subl="'/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl' $1"

使用

subl AAAA.txt

设置 sublime 为默认的文本编辑器

To use Sublime Text 2 as the editor for many commands that prompt for input, set your EDITOR environment variable:

export EDITOR='subl -w'