In OS X Lion, Apple added new functionality to Time Machine that automatically locks down files after two weeks. It was billed as a way to “prevent accidental changes in applications that support auto save,” but it has ended up being a nuisance. We’ll show you how to finally kick this “feature” to the curb and regain access to your locked files.
With Lion, Apple has included a way for developers to implement versioning control in their apps. So when you're saving files like documents you'll have access to both the past versions and current version. With a Time Machine-like interface, you’re able to view all of the changes in your documents and restore past versions if you accidentally delete something in the current version.