A new feature in Mac OS X Lion is that any documents have not been worked on in over two weeks are locked down. This is to prevent accidental auto-save changes from modifying your files. Thus, whenever you try to modify a file that you have not touched in over two weeks, you’ll receive the following message:

The file [File Name] is locked because you haven’t made any changes to it recently.

All you have to is to click the Unlock (or Duplicate) button and you’re back in business. While many people find this new functionality a handy addition to OS X, others find it more than annoying. Luckily, as I discovered while browsing Mac Life’s Web site, there is a way to disable this feature or change the time interval before a file becomes lock.

To Modify File Locking in Lion

1. Open the System Preferences App.
2. Click Time Machine .
3. Click the Options button.
4. To disable locking files, uncheck the box next to ”Lock documents [2 Weeks] after last edit.
4. To change the time interval between file locking, click the drop-down list after Lock Documents and choose 1 day, 1 week, 2 weeks, 1 month or 1 year.
5. Click Save

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