The megapatch is the seventh Apple security patch release in three months. It deals with vulnerabilities in Apple's own software, as well as third-party components such as Adobe Systems' Flash Player, OpenSSH and MySQL. Sixteen of the vulnerabilities addressed by the update were previously released as part of two high-profile bug-hunting campaigns. The vulnerabilities pose varying risks to Macs. Several of the flaws could be exploited to gain full control over a Mac running the vulnerable component, according to Apple's advisory. Other holes are limited and could only be exploited to crash a Mac or used by somebody who already has access to a machine to elevate privileges, for example. More at ZdNet