If you're still running macOS Monterey (12.x) on an older MacBook or iMac, storage pressure hits differently. You don't have the luxury of a 2 TB SSD, Apple Intelligence features aren't on the table, and every gigabyte genuinely matters. This guide walks through the safest, most effective ways to free up space on macOS Monterey — without wiping something you'll regret.
Before You Touch Anything: Check What's Actually Using Space
Open the Apple menu, choose About This Mac, then click the Storage tab. Click Manage to open the Storage Management window. This panel breaks your disk into categories — Applications, Documents, iOS Files, System Data, and more — and shows Apple's own recommendations.
The category that confuses almost everyone on Monterey is System Data. On macOS 12, "System Data" replaced the old "Other" label and includes a mix of caches, logs, local Time Machine snapshots, app support files, and APFS purgeable space. A healthy Mac typically shows 5–20 GB of System Data. If yours is above 30–40 GB, there's real bloat to reclaim.
Step 1: Clear User and Application Caches
Application caches accumulate over months and years. They are safe to delete — apps rebuild what they need on next launch, though the first open may be slower. The user cache folder lives at ~/Library/Caches.
- In Finder, press Shift + Command + G and type
~/Library/Caches. - Sort by Size. Identify large per-app folders (common offenders: Xcode derived data, Spotify, Google Chrome).
- Delete the contents of those subfolders — not the parent folder itself — then empty the Bin.
You can also do this from Terminal, but be precise. The following clears the contents of your user cache folder without removing the folder itself:
rm -rf ~/Library/Caches/*What not to touch: The system-level cache at /Library/Caches (no tilde) is mostly fine to clear, but leave /System/Library/Caches alone — that's macOS kernel territory.
Step 2: Remove Old iOS Device Backups
Phone backups are among the most surprising space hogs. A single full iPhone backup can easily run 8–15 GB, and old backups from previous devices can sit unnoticed for years.
On Monterey, iTunes is gone — backups now live in Finder.
- Open Finder and connect your iPhone or iPad (or simply go to the menu bar: Finder > Preferences — you don't need the device present to manage backups).
- Alternatively, go to Apple menu > About This Mac > Storage > Manage, then click iOS Files.
- Select any backup you no longer need and click Delete.
If you're keeping only one device, keep the single most recent backup and delete everything else.
Step 3: Tame Time Machine Local Snapshots
On APFS volumes (which your Monterey Mac almost certainly uses), Time Machine stores hourly local snapshots even when no external drive is connected. These count toward System Data and can balloon to tens of gigabytes.
To see what's on your disk:
tmutil listlocalsnapshots /You'll see output like com.apple.TimeMachine.2026-05-10-083000. To delete a specific snapshot:
sudo tmutil deletelocalsnapshots 2026-05-10-083000Repeat for each date you want to remove. macOS will keep creating new snapshots unless you turn Time Machine off entirely — but that's a personal backup decision, not just a storage one. Only disable it if you have another backup strategy in place.
You can also view and delete snapshots graphically in Disk Utility: select your main volume, then choose View > Show APFS Snapshots.
Step 4: Clean Up Log Files and Temporary Data
macOS writes diagnostic logs, crash reports, and system journals continuously. Most are small individually but accumulate over time.
~/Library/Logs— per-user app logs, safe to delete contents/Library/Logs— system-wide logs, safe to clear old entries/private/var/log— requires admin access; contains system journal files
To clear user logs from Terminal:
rm -rf ~/Library/Logs/*Do not delete the folders themselves, only the contents. Most log files are plain text and macOS recreates them automatically.
Step 5: Audit Large Files and Leftover App Data
The Storage Management window has a Documents section with a "Large Files" sub-view — use it. It surfaces files over a certain size threshold sorted by how recently you've opened them. Old disk images (.dmg files), downloaded installers, and archived video files tend to dominate this list.
Also check ~/Library/Application Support for folders belonging to apps you've already deleted. Uninstalling an app on macOS drags only the .app bundle to the Bin — it leaves behind support folders, preferences, and sometimes gigabytes of data. These orphaned folders accumulate silently.
~/Library/Application Support/— app data and databases~/Library/Preferences/— preference .plist files (small, but worth reviewing)~/Library/Containers/— sandboxed app data (can be large)
Be careful here: only delete folders you're certain correspond to apps you've removed and won't reinstall.
Step 6: Handle Purgeable Space
You may notice your disk shows less free space than Finder's "Available" figure suggests — the rest is listed as purgeable. Purgeable space is managed by APFS and macOS automatically reclaims it when you need room. You cannot directly delete it; the system clears it on demand.
If you want to force macOS to reclaim purgeable space faster, options include:
- Enabling Optimize Mac Storage in iCloud settings (System Preferences > Apple ID > iCloud)
- Rebooting — macOS often purges cached data during shutdown/startup
- Deleting Time Machine snapshots (see Step 3), which are a major source of purgeable blocks
Where a Cleaner App Helps (and What to Watch Out For)
Doing all of the above manually takes time and requires comfort with Terminal and Finder navigation. If you'd rather not hunt through Library folders by hand, a dedicated tool can automate much of it safely.
One option worth knowing about on older Macs is Crumb, a lightweight native menu-bar cleaner designed for macOS. It handles caches, logs, temp files, and System Data purgeable space in a single click, and includes an app uninstaller that removes both the .app bundle and its leftover support files — which is the part most people miss. It also has an "Is this safe to delete?" AI explainer if you're uncertain about a specific folder. There's a free tier if you want to try it before committing, and a one-time purchase option that suits people who don't want another subscription. You can download Crumb as a standard notarized .pkg installer.
A word on CleanMyMac: it does support Monterey, so if you already own it, it remains a valid option. The main caveat is its subscription pricing — on a machine you're planning to retire in a year or two, a one-time-purchase tool may be a better fit.
A Quick Safety Reference
| What to clean | Location | Safe? |
|---|---|---|
| User app caches | ~/Library/Caches |
Yes — apps rebuild on next launch |
| User logs | ~/Library/Logs |
Yes |
| iOS device backups | Finder / Storage Management | Yes — keep at least one current backup |
| Time Machine local snapshots | tmutil / Disk Utility |
Yes — they exist for local recovery; deleting them is permanent |
| Orphaned app support folders | ~/Library/Application Support |
Proceed carefully — confirm the app is gone first |
| System library caches | /Library/Caches |
Generally safe, but not required |
| System Library / kernel files | /System/Library |
No — leave this alone |
Conclusion
Freeing up space on macOS Monterey is entirely doable without upgrading your hardware. The highest-leverage moves are clearing user caches, removing old iOS backups, and pruning Time Machine local snapshots — together these can realistically recover 10–30 GB on a Mac that has been running for a few years. Work methodically, keep at least one current backup, and don't delete anything in /System or the macOS system volume. Your older Mac has plenty of life left with a cleaner disk.