I would just install it from here:
http://www.cmake.org/files/v2.8/cmake-2.8.8-Darwin64-universal.dmg
It's a precompiled binary. Look at ixxx69's instructions further down. They are more up to date.
OK installed it all as per the ixxx69 instructions.
tried a test "mkvdts2ac3 -n test.mkv" and get the following error
Code:
ERROR: ERROR: The program 'ffmpeg' is not in the path. Is ffmpeg installed?