How to Find Large Files on Mac
Most of your disk space is consumed by a small number of huge files: videos, archives, virtual machine images, old backups. OptiClear's Disk Map shows you exactly where the space goes — visually, instantly, drillable.
The 80/20 rule of Mac storage
On a typical Mac, the top 20 largest files account for 50–80% of the used storage. Finding and reviewing them takes minutes with the right tool but hours with Finder alone.
How OptiClear Disk Map works
Disk Map renders your entire drive as a treemap of nested rectangles, where size equals real bytes. Click any rectangle to drill in. Right-click to reveal in Finder or move directly to Trash.
Common culprits to look for
Watch for: ~/Library/Containers (sometimes 20+ GB for messaging apps), ~/Movies, Downloads with old DMG files, virtual machine bundles in Parallels/VMware folders, and old Time Machine local snapshots.
Frequently Asked Questions
What's the largest file size I should worry about?
Anything over 1 GB is worth reviewing. Files over 5 GB usually justify a careful look — they're often forgotten downloads or VM images.
Will OptiClear show files I don't have permission to read?
It shows their size but skips reading content. System-protected files are clearly marked.