It was something that would theoretically be evident last November, but Apple has delayed this by several months. The Cupertino company has sent an email to all developers registered in its program, warning that, as of March 2012, all applications on the Mac App Store will have to implement “sandboxing.”
What is Sandboxing? It is a measure that is generated for applications to restrict access to system resources, providing a lot more security and shielding the program from hackers who want to run malware by taking advantage of vulnerabilities. It is something that is already in use in applications such as Chrome, each tab opened is isolated from one another due to sandboxing in case of a failure or an attack, it would remains in a tab and does not extend to the whole browser.
Developers, in turn, demand that Apple provide better tools to implement sandboxing technique in their applications. We have to be careful with this, because if Apple does not make it easy for developers the Mac App Store might suffer by losing reliability. Of course, it seems that Apple will allow some access to allow some exceptions with some applications that need access to many system resources (with justification, of course).
Now it’s time that developers start working with this sandboxing into their applications. They have four months, long enough. Hopefully after March 1 we do not see some apps disappear because some applications did not meet that dateline.