Natural Order is a System extension that improves the sorting order that your Macintosh uses when it displays lists of items that have numbers in the name. If you have a group of numbered files on your disk and you select "View By Name" in the Finder, you might expect the files to be displayed in sensible numerical order, like this: Picture 1 Picture 10 Picture 2 This extension fixes the sorting by name like this: Picture 1 Picture 2 Picture 10 | 
