Open-With Manager

Open-With Manager is a simple Mac application that was designed to help you easily choose the types of files that an installed application might be able to open.

Basically, with the help of this tool you can modify the entries that can be found in the Finder's "Open With" context menu for any desired type of file.

But that's not all that Open-With Manager can help you do. This application can also modify the behavior of files when you drag them onto an application's icon (from Dock or other location). For example, the Mozilla Firefox browser can open image files, but, with the help of this tool, you can leave the corresponding boxes unchecked so that the drag-and-drop process won't have any effect.

Open-With Manager provides you with a simple way to create additional type sets (besides the already existing Pictures and Movies sets). All you have to do is type the name of the set and add the extensions of the files, separated by comma. It is simple, efficient and straight to the point.

Keep in mind the fact that, if your system is running on Mac OS X 10.5 or later, Open-With Manager will not edit signed applications.

To sum it all up, the lightweight Open-With Manager is an easy-to-use Mac application that is worth a shot if you want to edit the list of file types that an application can open.