Apple highlights Snow Leopard features

Apple's senior vice president of Mac OS engineering, Craig Federighi, demos the Snow Leopard version of the operating system

At Apple's WWDC in San Francisco, the company's senior vice president of Mac OS engineering, Craig Federighi, demos the Snow Leopard version of the operating system. For current Leopard users, the new OS — due in September — will be upgradable for $29 (£18).