Welcome to OmniDiskSweeper We have all had to deal with the fact that hard drives are a finite size and occasionally we fill them. Unfortunately, we sometimes fill our hard drives with a lot of files that take up too much space. The most frustrating part is that we do it without knowing—that's where OmniDiskSweeper comes in.
OmniDiskSweeper is a Mac OS X utility for quickly finding and deleting big, useless files and thus making space on your hard drives. OmniDiskSweeper makes this easy by highlighting the biggest files on your drives, and by noting which files are used by the system, so you don't accidentally delete important files.
Important: When you use OmniDiskSweeper you will have the option to remove files from your hard drives. You cannot undo after you have deleted a file so make sure you really want to get rid of it forever before clicking Delete.