OS X Mountain Lion, Apple’s latest operating system release from July 2012 introduces a number of new security features. For only 99 cents, Gatekeeper: What's New in OS X Mountain Lion Security, available for the Kindle, provides a good overview of these new features.
Gatekeeper is an anti-malware feature in OS X and enables users to restrict which external sources they will allow software applications from. Gatekeeper builds on OS X's existing malware checks to protect a Mac from malware and misbehaving applications.
In this short guide, Tim Warner shows how to use the various Gatekeeper functions. Some of the topics include how to configure the application sandbox, Unified Software Updates, Password Assistant, Parental Controls and more.
For less than a dollar, Gatekeeper: What's New in OS X Mountain Lion Security provides a lot of relevant information that any Mac user who cares about security should be reading about.