Apple has still left considerable gaps in Mac security, despite advances in Mac OS X Snow Leopard, say some security experts. The OS is said to have several protection advances over Leopard, most notably a built-in anti-virus scanner, perhaps the first concrete admission from Apple that Macs are now vulnerable to malware. The tool scans content received through apps like Safari, Mail and iChat, and can also check signatures to determine whether a file has been altered since its creation.
