Major overhaul makes OS X Lion king of security

“With Wednesday’s release of Mac OS X Lion, Apple has
definitively leapfrogged its rivals by offering an operating system
with state-of-the-art security protections that make it more
resistant to malware exploits and other hack attacks, two
researchers say.

“The most important addition is full ASLR. Short for address
space layout randomization, the protection makes it much harder for
attackers to exploit bugs by regularly changing the memory location
where shell code and other system components are loaded. Other
improvements include security sandboxes that tightly restrict the
way applications can interact with other parts of the operating
system and full disk encryption that doesn’t interfere with other
OS features.”

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