The Cupertino have updated their Xprotect anti-malware protection system to protect users, and not allow outdated versions of Flash cannot run on our Mac. This update is consistent with the one made a few hours ago by Adobe in your software Flash Player.
At the moment the security flaw discovered by Alexander Polyakov and Anton Ivanov, which allowed third parties to have access to our computer it would already be solved with the Flash Player update to version 12.0.0.44. Now those of Cupertino update the Xprotect antimalware protection system to improve security.
In this case the OS X user you don't have to take any action, or update anything. Xprotect is a system that Apple uses to protect its users from possible viruses and Trojans, this was introduced in the version of OS X Snow Leopard in 2009. If you want to check the content of XProtect on your system, you can go to the folder /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ and open the content of XProtect.plist with the Plist file editor that comes with Xcode.
Anything that improves user security is good, and we all know that Apple, and in this case thanks to the operating system, is very safe against virus or malware attacks, so we can rest easy in this regard. Of course, it is very important that we install Adobe Flash Player update on our Mac, if we haven't done it yet.
More information - Adobe Flash Player is updated to fix a vulnerability
