Truecrypt install fails - 3 out of 6 hunks FAILED
Bad News

The Truecrypt Formula on Homebrew has been removed due to bugs, and probably uncertainty in the community regarding truecrypt's safety.

There also used to be a homebrew cask which was removed due to installation bugs.  However, it was also moved to homebrew-unofficial and scheduled for removal.

For more information about the 3rd party audit, and why Truecrypt is still safe to use, please see the links mentioned here.

Good News

I have created a Homebrew Tap for Truecrypt 7.1a which fixes the installation problem, and works on OS X 10.10 Yosemite!

Installation

First, make sure you have installed homebrew-cask if you haven't yet:

brew install caskroom/cask/brew-cask


Then, run the following in your command-line:

brew tap trinitronx/homebrew-truecrypt


Usage

Note: For info run:

brew cask info truecrypt


Once the tap is installed, you can install truecrypt!

brew cask install truecrypt