ここを参考に。
http://ruirui.jp/blog/2013/03/homebrewopencv-243.html
$ brew versions opencv 2.4.5 git checkout 586e8b2 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.4.4a git checkout 3efa797 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.4.3 git checkout 8cb3f45 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.4.2 git checkout b64b319 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.4.1 git checkout 3d32cf1 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.4.0 git checkout 2a8c46b /usr/local/Library/Taps/homebrew-science/opencv.rb 2.3.1a git checkout cdaf83d /usr/local/Library/Taps/homebrew-science/opencv.rb 2.2 git checkout 032047f /usr/local/Library/Taps/homebrew-science/opencv.rb 2.1.1-pre git checkout 2438f42 /usr/local/Library/Taps/homebrew-science/opencv.rb HEAD git checkout c658897 /usr/local/Library/Taps/homebrew-science/opencv.rb 2.1.0 git checkout ecb6a3e /usr/local/Library/Taps/homebrew-science/opencv.rb $ cd /usr/local/Library/Taps/homebrew-science $ git checkout 8cb3f45 /usr/local/Library/Taps/homebrew-science/opencv.rb $ brew install opencv --with-tbb --with-qt --use-llvvm