OmniDiskSweeper is a

freeware Freeware is software, most often proprietary, that is distributed at no monetary cost to the end user. There is no agreed-upon set of rights, license, or EULA that defines ''freeware'' unambiguously; every publisher defines its own rules for t ...

disk space analyzer A disk utility is a utility program that allows a user to perform various functions on a computer disk, such as disk partitioning and logical volume management, as well as multiple smaller tasks such as changing drive letters and other mount p ...

utility for

macOS macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac (computer), Mac computers. Within the market of ...

developed by

The Omni Group The Omni Group is an American software company that develops software for the macOS, iOS, and watchOS platforms. The Omni Group was informally founded as a NEXTSTEP consulting company in 1989 by Wil Shipley, who immediately brought on Ken Case ...

, which

recursively Recursion (adjective: ''recursive'') occurs when a thing is defined in terms of itself or of its type. Recursion is used in a variety of disciplines ranging from linguistics to logic. The most common application of recursion is in mathematic ...

searches a filesystem and displays entries sorted and color-coded by size, from largest to smallest. Alternatives include

DaisyDisk DaisyDisk is a paid disk space analyzer for macOS. It displays a sunburst diagram of files on a hard drive to help with the location or deletion of large files. It can display previews of files using Quick Look. It also allows the user to look at ...

and

GrandPerspective GrandPerspective is open source software for Mac OS X used for disk space analysis in a graphical treemap. The application ranked #6 in the "50 Mac Essentials" list by Cult of Mac in 2010. With the release of version 2.5.4 on December 13, 2020, a ...

. Its interface presents a column view similar to the macOS

Finder Finder may refer to: * Finder (surname) * Finder (software), part of the Apple Macintosh operating system * ''Finder'' (comics), a comic book series by Carla Speed McNeil * ''Finder'' (novel), a 1994 novel by Emma Bull * Finder Wyvernspur, a fi ...

. OmniDiskSweeper supports internal and external drives, and network volumes. It warns users when selecting files that are required by

or by installed applications, though this only works for applications installed with macOS's Installer utility, based on BOM files. The program was first released in April 2001 as

shareware Shareware is a type of proprietary software that is initially shared by the owner for trial use at little or no cost. Often the software has limited functionality or incomplete documentation until the user sends payment to the software developer ...

. Early versions required payment to delete files, though users could also delete them manually through the Finder. The Omni Group relicensed it as freeware in 2009, stating a need to refocus on their other programs. Specialist outlets ''MacGeneration'' and ''Macworld'' describe it as a basic tool, useful to find large but unused files. ''The Register'' gave it a rating of 70/100, and included it in their 2010 selection of free essential Mac apps.

References

D MacOS-only proprietary software Disk usage analysis software {{mac-software-stub