Update: Homebrew was fixed while Yosemite was in beta. If you are running into problems after upgrading to Yosemite you can easily fix Homebrew by doing a git pull from /usr/local or do a brew update before updating your system to Yosemite. In other words, it is no longer needed to make changes to your Homebrew install manually. Some great work by the Homebrew team! Now that Apple opened up the be