GrandPerspective is open source software for Mac OS X used for disk space analysis in a graphical treemap.

[2][3][4] In 2010, the application was ranked at number six on Cult of Mac's "50 Mac Essentials" list.

[5] In December 2020, GrandPerspective, with its latest version at the time, released a new application icon in accordance with the MacOS Big Sur app icon guidelines.

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