I bought this program as part of a bundle from Intego. They claimed it was compatible with Snow Leopard. It is NOT. It slowed my System operations by 500% and often forced applications either to hang (beach ball spinning) or crash. If you choose the "constant protection" option, it examines every application, web link, and e-mail very slowly before letting the process run. That is redundant and unintelligent protection. When I complained and asked for my money back, the company refused. As far as I'm concerned, the offer is a scam and the software worthless. And it's NOT compatible with Snow Leopard, despite their claim that it is. Be warned!!