This is our playable demo of the full game, for Mac. Give it a try and let us know what you think on the forums.
Ambrosia Software are offering a full-game download at their Uplink site here. If you download that file you'll have the playable demo, with the added advantage that you can register it online (at Ambrosia) and you'll have the full game straight away - no need to wait for shipping.
Uplink is a trademark of Introversion Software