Hi,
What I do to have better control of the versions of play, I download the play from the website and configure the ~/.profile file adding the play folder to the path.
E.g.: cat ~/.profile:
PLAY_HOME=/Users/hugomonteiro/Documents/workspace/play_versions/play-2.0.4; export PLAY_HOME
export PATH=/opt/local/bin:/opt/local/sbin:$PLAY_HOME:$PATH
There is also a way to do with sbt, but I had some dependency problems :-)
Regards,