Matterform media has launched Sonar 2.0, and renew to the concurrent protection monitor for the Mac. It's now well-matched with Mac OS X 10.5 Leopard as well as Mac OS X 10.6 Snow Leopard. Sonar displays realtime information about modification made to your hard disk; it's useful for correcting applications that mark too normally to the hard disk and for monitoring untrusted applications downloaded from the Internet.