ZH:~ zhonghuan$ brew install opencv

==> Downloading https://github.com/Itseez/opencv/archive/2.4.9.tar.gz

######################################################################## 100.0%

curl: (33) HTTP server doesn't seem to support byte ranges. Cannot resume.

==> Trying a full download

######################################################################## 100.0%

==> cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/opencv/2.4.9 -DCMAKE_BUILD

==> make

==> make install

==> Caveats

If you need Python to find the installed site-packages:

echo '/usr/local/lib/python2.7/site-packages' > ~/Library/Python/2.7/lib/python/site-packages/homebrew.pth

==> Summary

因为

其中有这么一句话:

If you need Python to find the installed site-packages:

echo '/usr/local/lib/python2.7/site-packages' > ~/Library/Python/2.7/lib/python/site-packages/homebrew.pth

所以，我们照着它说的做就好了，在终端中输入：

echo '/usr/local/lib/python2.7/site-packages' > ~/Library/Python/2.7/lib/python/site-packages/homebrew.pth

为了测试一下，在终端中输入python，

然后输入：

import cv

import cv2

如果没有问题，则安装成功。