Guide for installing fife and fifechan from source could be found here:

Building Guide The MacOS fife/fifechan guide it not final yet.

• First step get git version (master branch):

git clone --depth 1 git://github.com/unknown-horizons/unknown-horizons.git

• Second step build the translations:

cd unknown-horizons && python setup.py build

• Now you can run Unknown-Horizons with:

python ./run_uh.py