3 Security features in Apple OS X Yosemite

Apple OS X Yosemite (10.10) has arrived, and it's time to look at what it's going to offer us from a security point of view. Apple has actually set up a special page dedicated to security for OS X with a lengthy amount of text – there's a lot of it, but it's comprehensible and rather easy to read. Unfortunately, it doesn't say a lot about what features are new.
Most of the security tools involved are given specific names – Gatekeeper, FileVault, etc. It's a marketing approach but it also helps to explain which tool does what. So, let's look at them.
Gatekeeper
It's an old feature (presented in OS X Mountain Lion 10.8) that protects a Mac from malware and “misbehaving apps downloaded from the internet.” It's similar in its purpose and behavior to the Windows User Account Control (UAC). In a nutshell, Gatekeeper checks whether the app, downloaded from other places rather than the Mac App Store, has the proper Developer ID. If it does not, it will not launch, unless the settings are changed.
FileVault 2
This security tool encrypts the entire drive on a Mac, protecting the data with XTS-AES 128 encryption. Apple says that the initial encryption is fast and unobtrusive. It can also encrypt any removable drive, helping the user secure Time Machine backups or other external drives.
Remote Wipe
This tool allows users to delete all of their personal data and restore their Mac's to the factory settings, if it has “changed the owner” without the user's consent. A milder option is to set a passcode lock remotely.
It doesn't, however, mean that it is an “absolutely” protected operating system – unfortunately, there are no such systems. Moreover, the number of threats targeting OS X, specifically, is growing as is the number of Mac users. This certainly has drawn the attention of criminals, who are looking into vulnerabilities and occasionally finding them.