How to Clear Cache on Mac
Caches make apps fast — but they also pile up. After a year, your Mac can have 5–20 GB of stale caches. OptiClear distinguishes safe-to-clear caches from active ones, so you free space without breaking anything.
Three types of cache on macOS
User caches in ~/Library/Caches (largest, safest to clear), system caches in /Library/Caches (smaller, mostly safe), and browser caches (huge for heavy users). OptiClear handles all three with the right safety rules.
When clearing cache fixes problems
Clearing cache often fixes: app crashes after updates, slow Spotlight searches, browser pages loading wrong, and Finder showing outdated previews. It's the safest first troubleshooting step.
What you should NEVER delete
Don't manually delete CloudKit caches or active app session data — you may lose unsaved work. OptiClear automatically protects these. Only delete caches via Finder if you know exactly what they're for.
Frequently Asked Questions
Will clearing cache delete my passwords or settings?
No. Passwords are in Keychain, settings are in Preferences — neither are caches. OptiClear never touches them.
How often should I clear cache?
Every 1–3 months, or whenever you notice slowness, app glitches, or low disk space.