FlexSDK Homebrew formula. Installs mxmlc and other tools.

flash_player.rb

require 'formula'

class FlashPlayer < Formula
  url 'http://fpdownload.macromedia.com/pub/flashplayer/updaters/11/flashplayer_11_sa_debug.app.zip'
  md5 '2770acd6997bfd5016dd51acfb20c025'
  homepage 'http://adobe.com'
  version '11.1'

  def install
    name = 'Flash Player Debugger.app'

    cp_r '.', "#{prefix}/#{name}"
    ln_s "#{prefix}/#{name}", "/Applications/#{name}"
  end
end

flex_sdk.rb

require 'formula'

class FlexSdk < Formula
  url 'http://fpdownload.adobe.com/pub/flex/sdk/builds/flex4.6/flex_sdk_4.6.0.23201B.zip'

  md5 '202bca98ee7b8db9cda3af01e99c688e'
  homepage 'http://opensource.adobe.com/'
  version 'v4.6.0.23201'

  def install
    Dir['*'].each { |file| cp_r file, File.join( prefix, File.basename(file) ) }

    ohai %{You will need to add the Flex SDK to your path:}
    ohai %{  export PATH="#{bin}":$PATH}
  end
end

brew install "https://gist.github.com/raw/1730297/5cabfd07acef9bd4b49875543a3effacbb17da54/flash_player.rb"

brew install "https://gist.github.com/raw/1730297/68521bf2f211c739ec19366070a8cb8066ec185b/flex_sdk.rb"

I was getting undefined method md5 error while trying to update or using any homebrew commands.

To solve this problem you can basically remove the md5 line or replacing by sha256.

brew edit flex_sdk