Finding storage on your Mac is simpler when you know where to look and what each option does. This guide walks through built-in tools, menu commands, and maintenance habits so you can keep your startup disk healthy.
Use the overview below to quickly compare methods, then explore deeper details in the sections that follow.
| Method | Where to Access | Best For | Immediate Action |
|---|---|---|---|
| About This Mac Storage | Apple menu > About This Mac > Storage | High-level overview by file category | Click Manage to see recommendations |
| Finder Info | Select item > Cmd + I or right-click > Get Info | Exact size of individual files and folders | Sort by Size in Finder views |
| About Storage Manager | System Settings > Storage > Manage Recommendations | Detailed app usage and large files | Review Recommendations daily |
| Disk Utility First Aid | Disk Utility > Select disk > First Aid | Verifying and repairing directory structures | Run First Aid before intensive tasks |
| Terminal df and du | Terminal app, e.g. df -hT / | Scripting, precise paths, remote troubleshooting | Back up data before running advanced commands |
About This Mac Storage Overview
The About This Mac Storage panel gives a color-coded breakdown of how space is used across system, apps, photos, backups, and other files. It updates periodically and is ideal for quick audits.
You can dive deeper with the Manage button, which surfaces recommendations like reduce clutter, optimize storage, and empty the Trash automatically.
Finder Get Info Inspect
Use Get Info in Finder to see the precise size of any file or folder, including items hidden by app bundles or package structures. This method helps you identify unexpectedly large documents, downloads, or cache folders.
Remember that some system folders report shared or allocated sizes that may appear larger than their on-disk usage due to compression and snapshots.
About Storage Manager Analysis
Storage Manager, found in System Settings, offers a more modern interface with categorized recommendations, app size trends over time, and a visual breakdown by file type.
Within Manage Recommendations you can review large files, documents, and apps that are candidates for removal or offload, making it easier to keep your startup disk lean.
Disk Utility First Aid Checks
Running First Aid in Disk Utility verifies the integrity of your APFS or Mac OS Extended volume and can resolve minor directory errors that affect reported free space.
Schedule a quick check monthly or after unexpected restarts to ensure your file system maps accurately to the physical storage.
Terminal Advanced Queries
Terminal commands like df, du, and nc provide precise control when you need to script storage checks or troubleshoot on remote Macs.
Use caution with advanced flags, confirm paths carefully, and back up important data before modifying files based on terminal output.
Recommended Practices for Mac Storage
- Review About This Mac Storage monthly and act on Manage Recommendations promptly.
- Use Get Info to investigate any folder that grows unexpectedly large.
- Empty the Trash and clear Downloads regularly to avoid accumulation of forgotten files.
- Enable Optimize Storage if you rely heavily on iCloud Photos or have limited SSD space.
- Run Disk Utility First Aid after major system updates to keep volume metadata healthy.
FAQ
Reader questions
How do I find the largest folders on my Mac quickly?
Open About This Mac, click Storage, then Manage Recommendations and sort by size in the built-in storage manager; for precise folder sizes, use Get Info in Finder or run a du command in Terminal on user directories.
Why does available space differ between About This Mac and Finder?
About This Mac includes system files, cached data, and snapshots that Finder may hide, while Finder reports visible file sizes and permissions, which can cause differences especially after large updates or backups.
Should I regularly empty the Trash to free storage on Mac?
Yes, emptying the Trash prevents deleted media and documents from continuing to occupy your startup disk, especially if you work with large files like video or disk images.
What does Optimize Storage in Settings do for my photos?
Optimize Storage replaces local full-resolution photos and videos with smaller placeholder versions while keeping the full assets in iCloud, reducing onMac footprint without losing access when needed.