Adds the necessary drivers and aloha to operate the Power Port Juggler connected to your Macintosh. Together with this extension you need to install another extension which depend on your model. Install 'PJ Classic' for Port Jugglers received before June of '96, 'PJ 4x' for Port juggler 4x,  'PJ Power5' for POWER Port juggler with 5 silver serial connectors and 'PJ Power' for POWER Port Jugler with 1, 2 or 3 siver serial connectors.