Running low on storage can slow down updates, cause apps to crash, and make your Mac feel sluggish. The good news: you can usually recover a lot of space without installing anything—if you clean up in the right order. This 2026-friendly guide walks you through safe, high-impact steps first, then deeper options if you still need more space.

1) Check what’s actually using your storage

Before deleting anything, find the biggest offenders so you don’t waste time on tiny files.

  1. Open storage breakdown: Apple menu → System Settings → General → Storage (or on older macOS: About This Mac → Storage → Manage).
  2. Wait for categories to populate (Applications, Documents, Photos, System Data, etc.).
  3. Note the top 2–3 categories consuming space—these are your fastest wins.

Tip: If “System Data” is huge, it’s often caches, logs, local snapshots, or old updates—not something you should “blind delete.” Use the targeted steps below.

2) Empty the Trash (but do it intentionally)

This is the quickest obvious win—and it’s surprisingly common for the Trash to hold tens of GB.

  1. Open Trash.
  2. Scan for anything you might need (especially project folders or photo libraries).
  3. Click Empty.

Optional: Finder → Settings → Advanced → enable Remove items from the Trash after 30 days if you want automatic cleanup.

3) Remove large files you no longer need (fastest space back)

Large videos, installers, and old archives are often the biggest, safest targets.

  1. In Finder, open Recents and switch to list view.
  2. Use Group By: Size or sort by size (View Options can help).
  3. Check common hotspots:
    • Downloads (old .dmg installers, .zip archives)
    • Desktop (forgotten exports and screen recordings)
    • Movies (screen captures, edited renders)
  4. Delete what you truly don’t need, then empty Trash.

Safety rule: Don’t delete random items inside Library unless you know what they are—use cache-clean steps instead.

4) Uninstall apps you don’t use (and remove leftover data)

Apps can be huge, and some also store large support files.

  1. Open Applications.
  2. Sort by size (Finder list view makes this easier).
  3. Delete apps you don’t use (drag to Trash), then empty Trash.

Leftovers: Some apps leave caches and support files behind. After uninstalling, you can remove related data from your user Library folders (next section) if you’re confident. When in doubt, focus on caches only, not preferences or saved data.

5) Clear safe caches (without breaking apps)

Caches can grow large over time. Clearing them is usually safe; apps will rebuild them as needed.

  1. In Finder, press Command + Shift + G.
  2. Go to: ~/Library/Caches
  3. Move large cache folders to Trash (or delete contents), then restart your Mac and empty Trash if everything works fine.

Browser caches: You can also clear Safari/Chrome caches via each browser’s settings. This often recovers space and can resolve performance issues.

6) Find and remove iPhone/iPad backups

Device backups can quietly consume tens or hundreds of GB.

  • Finder backups (macOS Catalina+): Connect your device → open Finder → select your iPhone/iPad → Manage Backups → delete old ones.
  • Storage view: System Settings → General → Storage may also surface backups for review.

Keep at least one recent backup if you rely on local restores.

7) Reduce Photos and media storage (the right way)

Photos and videos are often the largest category.

  • iCloud Photos optimization: Photos → Settings → iCloud → enable Optimize Mac Storage to keep smaller local copies when space is tight.
  • Delete large videos: In Photos, filter by videos and remove what you don’t need (then empty “Recently Deleted”).
  • Music/TV downloads: Remove downloaded media you can stream again later.

Note: If you delete from Photos with iCloud enabled, it deletes across devices. Prefer “Optimize Storage” if your goal is local space savings without losing items.

8) Clean up “System Data” with targeted actions

If “System Data” is unusually large, try these safe approaches first:

  • Restart your Mac (clears some temporary files and can trigger cleanup).
  • Update macOS (some versions clean old system components after updates).
  • Delete old installers: Check /Applications for “Install macOS …” apps you no longer need.
  • Remove old Xcode data (if applicable): Xcode caches/simulators can be massive; remove unused simulators and derived data if you’re a developer.

About Time Machine local snapshots: macOS may keep temporary snapshots when your backup drive isn’t connected. These usually shrink automatically when space is needed, but if you’re critically low, connecting your Time Machine drive and running a backup often helps macOS reconcile and remove old snapshots.

9) Move files off the Mac (best long-term fix)

If you routinely run out of space, deleting is only a temporary relief. Consider moving “cold storage” elsewhere:

  • External SSD for video projects, photo archives, and game libraries.
  • Cloud storage (iCloud Drive, Dropbox, OneDrive) with “online-only” options for large folders.
  • Network storage (NAS) for multi-device access at home/office.

10) Quick checklist: the safest order to reclaim space

  1. Empty Trash
  2. Delete large files in Downloads/Desktop/Movies
  3. Remove unused apps
  4. Delete old iPhone/iPad backups
  5. Clear user caches (~/Library/Caches)
  6. Optimize Photos storage / remove downloads
  7. Move archives to external/cloud

What to avoid

  • Don’t delete random “System” folders (e.g., /System, most of /Library)—this can break macOS.
  • Be careful with “cleaner” apps that promise one-click fixes; use built-in tools first.
  • Don’t remove files you can’t identify inside Library unless you’ve confirmed what they do.

After cleanup: confirm you have enough free space

Aim to keep at least 10–20% of your drive free for smooth updates, swap memory, and app performance (especially on smaller SSDs). Recheck System Settings → General → Storage to confirm the gain and identify any remaining large categories.