MacStorageAtlas review
A free macOS disk analyzer with a treemap, folder tree, and file-type breakdown.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
MacStorageAtlas is a native disk space analyzer for macOS, designed for people who want to understand how folders and files occupy a drive. It runs on Apple Silicon and Intel Macs, and can scan folders or volumes. Its mix of visual and list-based views makes it suited to individual Mac users and small teams who want to locate storage-heavy items without paying for the app.
The analysis centers on several complementary views: an interactive proportional treemap, a sortable folder tree, a file-type breakdown, and a list of the largest files with counts, sizes, and paths. Search and filtering by name or path help narrow the results. Scan behavior can be configured for hidden files, symbolic links, app bundles, and real on-disk versus logical size measurement; live progress and cancellation provide control while scans run. These options make it more than a single-purpose treemap, while keeping its focus on local storage analysis.
Cleanup actions connect the findings to macOS: users can reveal an item in Finder or move it to the Trash after confirmation. MacStorageAtlas is free and open source under the MIT License. Its builds are unsigned and unnotarized, and support is through documentation, so those factors may matter to users weighing installation and help needs. Choose it for a free, configurable disk map on a Mac; look elsewhere if you need a product for another operating system or prefer signed and notarized builds.
MacStorageAtlas pros and cons
- Where it wins
- Maps storage with an interactive proportional treemap and sortable folder tree
- Shows file types and largest files with counts, sizes, and paths
- Lets users search, reveal items in Finder, and move selected items to Trash
- Where it doesn't
- Available for macOS only
- Builds are unsigned and unnotarized
- Support is through documentation
MacStorageAtlas fact sheet, pricing and score →
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