How to Free Up Mac Disk Space After a macOS Update
After a major macOS update — especially upgrading from Ventura to Sonoma, or Sonoma to Sequoia — your available disk space can drop by several gigabytes even though the update itself was supposed to improve things. This happens because macOS leaves behind update caches, old system snapshots, and rebuilt indexes. Here's what's taking the space and how to get it back.
Why macOS Updates Use So Much Space
Update installer cache — macOS downloads the full installer (often 12–13 GB) to /Library/Updates/ or ~/Library/Caches/com.apple.SoftwareUpdate/. It's not always cleaned up automatically after a successful install.
APFS snapshots — Before the update, macOS creates a local snapshot so it can roll back if something goes wrong. These snapshots can persist for days or weeks after a successful update, silently occupying space that doesn't show up clearly in Finder.
Rebuilt caches and indexes — Spotlight, font caches, and APFS metadata get rebuilt after an update. During this process, temporary files consume extra space. This usually resolves on its own within 24–48 hours as the rebuild completes.
Old kernel extensions and support files — Deprecated frameworks and kernel extensions from the previous OS version may remain in /Library/ and /System/Library/. macOS handles most of these, but some linger depending on the upgrade path.
Check Your Available Disk Space
Before cleaning anything, confirm how much space you actually have:
System Settings — Apple menu → About This Mac → More Info → Storage. On Sonoma and later: Apple menu → System Settings → General → Storage. The bar chart breaks down usage by category.
Terminal — For an exact number without the UI lag:
df -h /The Avail column shows free space on the boot volume. MacSweep's Overview screen shows the same information with a real-time visual gauge and a breakdown by category.
Safe Ways to Reclaim Space After an Update
1. Empty the Trash
The simplest step — and often overlooked. macOS moves some old system files to Trash during updates. Right-click the Trash icon in the Dock and choose Empty Trash. If you want to review what's in there before deleting, MacSweep shows the full Trash contents with file sizes and ages.
2. Clear the macOS Update Cache
After a successful update, the downloaded installer files are no longer needed. You can remove them safely:
sudo rm -rf /Library/Updates/*
rm -rf ~/Library/Caches/com.apple.SoftwareUpdate/These paths are safe to clear once the update has completed without issues. If macOS needs to re-download anything for a future update, it will do so automatically.
3. Clean System and User Caches
Caches in ~/Library/Caches/ are generated by apps as needed and are safe to delete — apps will rebuild them on next launch, though some may take a moment longer to start up. System caches in /Library/Caches/ are generally safe too, but require more care since some are shared by OS components.
MacSweep's Caches module scans both user and system caches with risk labels for each entry, so you can see exactly what each cache belongs to before deciding whether to remove it.
4. Remove Old APFS Snapshots (Advanced)
List local snapshots on your boot volume:
tmutil listlocalsnapshots /If you see snapshots dated before your update and the update has been stable for a few days, you can delete them:
sudo tmutil deletelocalsnapshots YYYY-MM-DD-HHMMSSReplace YYYY-MM-DD-HHMMSS with the exact timestamp from the list output. Only delete snapshots if your update is working correctly — they are your rollback path if something went wrong.
5. Run MacSweep Smart Care
Smart Care scans caches, Trash, temp files, app leftovers, Docker storage, logs, and large files in one pass. After a macOS update, it typically finds 3–8 GB of cleanable files. Every result is labeled Safe, Review, or Do Not Delete — you decide what goes.
What NOT to Delete After a macOS Update
Don't delete /System/ or /Library/ files manually — macOS System Integrity Protection (SIP) blocks most of this for good reason. Files in these directories that legitimately need cleanup are handled by macOS itself or require careful, targeted removal.
Don't delete APFS snapshots if your update is unstable — if you're experiencing crashes, missing features, or other post-update problems, those snapshots are your path back to the previous OS version. Remove them only once you're confident the update is solid.
Don't clear ~/Library/Application Support/ — this directory holds app data: documents, databases, and saved state. It's not a cache directory, even though it sits next to one. Deleting from here can cause app data loss.
Wait 24–48 hours before aggressive cleanup — Spotlight re-indexing and rebuilt caches need time to finish. Cleaning during this window can interrupt the process and cause it to start over, temporarily making things worse.
Frequently Asked Questions
How much space can I expect to recover after a macOS update?
Typically 3–10 GB, depending on how large the update was and how many caches were rebuilt. Major version upgrades (for example, Ventura to Sonoma) tend to leave more behind than point releases like 14.3 to 14.4. The update installer cache alone can account for 4–6 GB.
Is it safe to delete system caches after an update?
User caches in ~/Library/Caches/ are safe — apps rebuild them on demand. System caches in /Library/Caches/ are generally safe too, but the contents vary by entry. MacSweep labels each item by risk level so you don't have to make that judgment from a path name alone.
Why does my Mac show less free space right after an update?
Spotlight is re-indexing, APFS snapshots from before the update are still in place, and the update installer cache hasn't been cleaned yet. These are all temporary. Give it 24–48 hours for automatic cleanup, then use the steps above for anything that remains.
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