What cache is and why you might clear it

Cache is temporary data your MacBook stores to make things load faster next time. When you visit a website, your browser saves images and code. When you open an app, it stores pieces of information it might need again. Your Mac does this automatically — you never ask it to.

Most of the time, cache helps you. Pages load faster. Apps start quicker. But cache takes up disk space, and sometimes old cached data causes problems: a website looks wrong, an app crashes, or you see outdated information. Clearing cache is safe — your Mac will rebuild it the next time you need it.

There are three places cache lives on a MacBook Pro, and you clear each one differently. You do not need to clear all three at once. Start with whichever one is causing the problem.

Key Takeaways

  • Browser cache lives inside Safari, Chrome, or Firefox and is the easiest to clear — you do it from the browser menu in under a minute.
  • System cache is stored by macOS itself and requires opening Finder and navigating to a hidden folder, or using Disk Utility to clear it all at once.
  • App cache is individual to each program and lives in a Library folder; clearing it fixes crashes or outdated data within a specific app.
  • Clearing cache never deletes your passwords, saved websites, or files — it only removes temporary data your Mac rebuilds automatically.

Clearing browser cache in Safari

Safari cache is the most common type to clear, and it takes 30 seconds. Open Safari, then click Safari in the menu bar at the top of your screen (not the Safari icon in the dock — the word "Safari" in the menu). A dropdown appears.

Click Clear History near the bottom of that menu. A window pops up asking how far back you want to clear. Choose All History from the dropdown menu. This clears cached images, code, and browsing history all at once. Click Clear History again to confirm. You are done.

If you want to clear cache without clearing your browsing history, use this method instead: click Safari in the menu bar, then Settings, then the Privacy tab. Check the box next to Remove history items and choose After one day from the dropdown. Safari will now clear old cache automatically every day, keeping recent history intact.

Clearing browser cache in Chrome or Firefox

Chrome and Firefox store cache the same way Safari does, but the menu is in a different place. Open Chrome, then press Command + Shift + Delete on your keyboard. A window titled "Clear Browsing Data" opens when ready. Make sure the time range at the top says All Time, then click Clear Data.

Firefox uses the same keyboard shortcut: Command + Shift + Delete. The window that opens says "Clear Recent History" at the top. Set the dropdown to Everything, make sure Cache is checked, then click Clear Now.

Clearing system cache from Finder

System cache is data macOS itself stores, separate from any browser or app. It is harder to reach because the folder is hidden by default. Open Finder, then press Command + Shift + G. A box appears asking you to type a path. Type this exactly: ~/Library/Caches and press Enter.

A folder opens showing dozens of subfolders, each one cache for a different app or system process. You can delete individual folders if you know which app is causing problems — for example, the folder named "Google" contains Chrome cache. Or you can select all of them by pressing Command + A, then press Delete. Your Mac will ask for your password. Type it and press Enter. Some files may not delete if they are in use; that is normal, and you can skip those.

If you want to clear system cache without navigating folders, use Disk Utility instead. Open Finder, click Applications on the left, then Utilities, then double-click Disk Utility. Click your hard drive name on the left (usually "Macintosh HD"), then click the Info button at the top. Look for "Purgeable" — that number is cache your Mac can safely delete. Click Empty Trash in the Finder dock to free that space.

Clearing cache for a specific app

If one app is crashing or showing outdated information, clear only that app's cache. Open Finder, press Command + Shift + G, and type ~/Library/Caches again. Look for a folder with the app's name — for example, "Microsoft" for Word, or "Slack" for Slack.

Right-click that folder and click Move to Trash. The next time you open the app, it will rebuild its cache from scratch. This fixes most app crashes and display problems without touching anything else on your Mac.

What does not get deleted when you clear cache

Clearing cache is safe because it only removes temporary data. Your passwords stay saved. Websites you have bookmarked stay bookmarked. Files you have downloaded stay in your Downloads folder. Your login information for apps stays intact. The only thing that goes is the temporary copies your Mac made to speed things up.

If you are worried about losing something, write down any passwords you use frequently before you clear cache, just in case. But in practice, you will not lose anything important.

When to clear cache and when not to

Clear browser cache if a website looks broken, loads slowly, or shows old information. Clear app cache if an app crashes repeatedly or behaves strangely. Clear system cache if your Mac is running slowly or you need to free up disk space.

You do not need to clear cache on a schedule. Some people clear it monthly, some never do it. If your Mac is working fine, there is no reason to clear cache — it is doing its job. Only clear it when something is not working right or when you need the disk space back.

Frequently Asked Questions

Will clearing cache make my Mac faster?

Only if the cache is corrupted or taking up a lot of space. If your Mac is running fine, clearing cache will not make it noticeably faster. In fact, you might notice things load slightly slower for a few minutes after clearing cache, because your Mac has to rebuild it from scratch.

How often should I clear cache?

There is no set schedule. Clear cache when a website or app is not working right, or when you need to free up disk space. If your Mac is running smoothly, you do not need to clear cache at all. Some people do it monthly as routine maintenance, but it is not necessary.

Does clearing cache delete my passwords?

No. Passwords are stored separately from cache. Clearing cache removes only temporary data like images and code. Your saved passwords, credit card information, and login details stay on your Mac.

Can I clear cache without losing my browsing history?

Yes. In Safari, go to Settings and turn on "Remove history items" set to "After one day" — this clears old cache automatically while keeping recent history. In Chrome and Firefox, uncheck "Cookies and other site data" before clicking Clear Data, and only cache will be removed.

What if I clear cache and a website still does not work?

Try restarting your Mac, then restart your browser. If the problem continues, try a different browser to see if it is specific to Safari, Chrome, or Firefox. If the problem happens in all browsers, the issue is likely with the website itself, not your cache.