Apple has released the newest version of its OS X operating system, dubbed Lion. It includes a batch of new security protections that bring it up to the level of Windows and Internet Explorer. The most significant additions, experts say, is the full implementation of ASLR and a sandbox that make it much more difficult for attackers to exploit browser bugs via a drive-by download to install malware on a victim s machine. The major browser vendors have been adding exploit mitigations and other protections in recent versions.
Source: https://threatpost.com/apple-revamps-security-os-x-lion-072111/75459/