DiskPress is a Mac menu bar storage optimization tool that combines native file compression and APFS deduplication to reclaim disk space without deleting or moving files. ($9.99, one-time)
The compression engine targets supported file types and can achieve storage reductions of up to 50% on applicable content. APFS deduplication uses the file system’s copy-on-write mechanism to identify and eliminate redundant data blocks across enabled folders, reducing space consumed by duplicate files without merging or altering them from the user’s perspective. Files remain accessible in their original locations and open in associated applications normally after processing.
DiskPress runs background monitoring with adjustable CPU profiles to limit system impact during active use. A command-line interface supports integration with automation scripts and developer workflows. Customizable exclusion rules automatically bypass archives, media files, and executable binaries. Per-file activity logs allow review of the result of each compression or deduplication operation. All file processing occurs locally with no data uploaded.
System requirements: macOS 10.15 (Catalina) or later; requires APFS-formatted volumes for deduplication. Works offline.
Pricing: ($9.99, one-time.) Available on the Mac App Store.
Limitations: APFS deduplication applies only to APFS-formatted volumes; older HFS+ drives are unsupported for deduplication. Compression gains are zero for already-compressed formats including JPEG, MP4, and ZIP files. Pricing is not listed on the developer’s website without visiting the App Store.
Alternatives: OmniDiskSweeper (identifies large files for manual deletion, no compression); Disk Diag (free disk usage analysis without compression); CleanMyMac X (broader system cleaner with storage optimization features).
Suitable for users with APFS volumes who want automatic, non-destructive storage reclamation through compression and deduplication without managing file archives manually.
