How to Do a Deep Clean on Mac (Advanced Methods)
When Basic Cleanup Is Not Enough
Basic how to clean up mac methods cover Downloads, Trash, and obvious caches. A deep clean mac session goes further, targeting hidden system files, obscure cache locations, and accumulated data that standard tools might miss. This advanced mac cleanup guide is for users who have already done the basics and want to recover every possible byte.
Warning: some steps in this guide involve system files. Follow instructions carefully and make a Time Machine backup before starting.
Deep Clean Step 1: Extended Cache Clearing
Beyond ~/Library/Caches, check /Library/Caches for system-level caches and /System/Library/Caches for core macOS caches. The system-level caches are safe to clear for most users but will require administrator access.
Browser profile folders contain cache data beyond what the browser's clear cache button removes. For Chrome, check ~/Library/Application Support/Google/Chrome/Default/Service Worker. For Firefox, check the profile folder in ~/Library/Application Support/Firefox/Profiles.
Reclaim Mac finds and removes junk files automatically.
Deep Clean Step 2: Log and Diagnostic Cleanup
Navigate to ~/Library/Logs and /Library/Logs. Delete old crash reports, diagnostic messages, and app-specific logs. Files older than a month serve no practical purpose. The deep clean mac approach treats these aging logs as recoverable space.
Check /private/var/log for system logs. These are managed by macOS but can accumulate if log rotation fails. Large files here indicate logging issues worth investigating.
Deep Clean Step 3: Language and Localization Files
macOS apps include translations for dozens of languages you will never use. These localization files can total several gigabytes across all installed apps. Tools like Reclaim Mac can identify and safely remove unused language files as part of how to clean up mac thoroughly.
Note that removing localization files from Apple apps is not recommended. Focus on third-party apps where the space recovery is safe.
Deep Clean Step 4: Old iOS and Device Backups
Check ~/Library/Application Support/MobileSync/Backup for old device backups. Each backup can consume 5 to 50 GB. If you use iCloud for device backups, these local copies are redundant.
Also check for old iPSW firmware files in ~/Library/iTunes if you have an older iTunes setup. These firmware files are large and easily re-downloaded if needed.
Deep Clean Step 5: Developer Artifacts
Xcode users should clear ~/Library/Developer/Xcode/DerivedData, old simulators, and archives. Check ~/Library/Developer/Xcode/iOS DeviceSupport for old device support files.
Node.js users should delete node_modules from inactive projects. Docker users should run docker system prune to remove unused containers and images. This advanced mac cleanup step targets the biggest developer-specific space wasters.
The Nuclear Option: Reclaim Mac Full Scan
After manual deep cleaning, run Reclaim Mac for a comprehensive scan. It catches files in locations you might have missed and provides one final sweep to ensure everything recoverable has been found. This combination of manual deep clean mac work and automated scanning delivers the most thorough cleanup possible.
Clean your Mac in 60 seconds
Lifetime license. Offline. No subscription.