Apple is distributing copies of its yet unreleased OS X 10.7 (Lion) operating system to a handful of security experts, including former Pwn2Own winner, Charlie Miller, who claims this is the first time Apple has taken such actions. The move, believed to be a first for the Cupertino, California, software giant, comes after some high profile security mishaps. Recent months have seen the emergence of the BlackHole RAT, a remote access Trojan authored specifically for Macs. There have also been increased complaints regarding iTunes related frauds and account hacks.
Source: https://threatpost.com/apple-taps-security-experts-ahead-lion-os-release-030711/75001/