Caches are a good idea that quietly overstays its welcome. Your Mac saves bits of data — thumbnails, web assets, app state — so it doesn't have to rebuild them every time. That makes things fast. But stale or bloated caches can also waste gigabytes, cause weird glitches, or leave an app stuck on yesterday's data. Below is how to clear cache on Mac safely, by hand, plus the folders you should never touch.
The three kinds of cache on a Mac
Before you delete anything, it helps to know what you're looking at. There are three places caches live, and they are not equally safe to clear.
| Cache type | Where it lives | Safe to clear? |
|---|---|---|
| User caches | ~/Library/Caches | Mostly yes — apps rebuild them |
| System caches | /Library/Caches and /System | Risky — leave most alone |
| Browser caches | Inside each browser | Yes — but you may get signed out |
The short version: user caches are the safe place to start, browser caches are best cleared from inside the browser, and system caches are best left to macOS unless you know exactly what a file does. Deleting system files blindly can break logins, fonts, or boot.
How to clear user caches in Finder
User caches are the most common reason your Library folder balloons. Here's the safe, manual way to clear cache on Mac for your account:
- In Finder, click the Go menu, then hold Option to reveal Library (it's hidden by default). Or press Shift + Command + G and type
~/Library/Caches. - Quit the apps first. Don't delete the cache of an app that's running — close it before you touch its folder.
- You'll see folders named after apps (for example
com.apple.Safariorcom.spotify.client). Open a folder and delete its contents — the loose files inside — rather than the folder itself. - Move what you select to the Trash. macOS will rebuild anything an app still needs.
- Empty the Trash only once you've confirmed everything still works normally.
Rule of thumb: delete the files inside a cache folder, not the parent folder. Some apps expect their named folder to exist and stumble if it vanishes.
One caution worth repeating: think twice before nuking large caches you can't cheaply rebuild. A media app's offline downloads or a development tool's device-support files can take a long time — and a lot of bandwidth — to regenerate.
Clearing browser caches the right way
Browser caches are the fastest win and the safest to delete, because every browser rebuilds them on the next visit. You'll usually just need to sign back into a few sites.
- Safari: turn on the Develop menu (Settings → Advanced → "Show features for web developers"), then choose Develop → Empty Caches. To clear site data too, use Settings → Privacy → Manage Website Data.
- Chrome: press Shift + Command + Delete, pick a time range, tick Cached images and files, then clear.
- Firefox: Settings → Privacy & Security → Cookies and Site Data → Clear Data, then choose the cached content.
If you only want to fix one broken site, clearing that site's data is gentler than wiping every browser cache at once.
Checking storage before you dig
macOS has a useful, non-destructive overview built in. Open the Apple menu → System Settings → General → Storage. The bar chart and the lists underneath show what's eating your disk — Applications, Documents, and a catch-all "System Data" bucket that includes many caches. It won't delete caches surgically for you, but it's a good way to see whether caches are even your problem before you start hunting through Library.
When MacScrub is the faster, safer choice
Doing this by hand works, but it's slow, and the real risk is human error — deleting the wrong folder, or one an app can't rebuild. That's the gap MacScrub fills.
MacScrub scans your user and app caches, shows you exactly what each item is and why it's safe to remove, and only clears what you approve. A few things make it a calmer way to delete cache on Mac:
- Everything goes to the Trash first. Nothing is shredded — if you change your mind, it's recoverable.
- Built-in guards skip what you'd miss. It leaves things like Spotify's offline cache and your latest Xcode device support alone, instead of treating every cache as junk.
- The cleaning rules are open source on GitHub. You can read exactly what it removes. No telemetry, no trackers, no background daemons.
- Apple-silicon native and notarized, with a byte-exact duplicate finder and a full app uninstaller alongside the cache tools.
It's free for 7 days, then a one-time $49 — no subscription, ever. If you clear caches once a year, the manual route above is fine. If you're tired of guessing which folder is safe, let MacScrub show you, recoverably, and move on with your day.