Actually both ways to spell it are correct. Also, unless your drive is getting full, you probably have NO fragmenting at all. The way Mac's work, it will only break up a file if theres not a single chunk of space ANYWHERE on the disk to fit the file. So if you have a 60 GB drive with 30 GB of stuff on it, chances are any file you add, there will be a big enough area somewhere on the disk to place the file without breaking it up.