This the page with instructions about downloading Mobile Processing
http://mobile.processing.org/download/index.php
You need to download both Mobile Processing and a simulator programme (sdk).
Here you can download the sdk (simulator programme) for the Mac (a different link from the one in the Mobile Processing instructions)
http://mpowerplayer.com/sdk
Here you will find the information about many mobile phones. If you can’t find yours, choose one which has a similar screen resolution to yours.
http://mobile.processing.org/phones/list.php
We suggest you put the SDK in the Mobile Processing folder so it is all together.