What clearing your cache does

Clearing your cache removes temporary files that your browser and Mac have stored to make websites load faster. These files pile up over time and can slow down your computer, cause websites to display incorrectly, or use up disk space you need for other things. Clearing cache is safe — it does not delete passwords, bookmarks, or any files you actually created.

You may want to clear cache if a website looks broken, if your Mac is running slowly, or if you want to free up storage space. Some people clear it regularly as part of maintenance; others only do it when something stops working right.

Key Takeaways

  • Clearing cache removes temporary files stored by your browser and Mac, which can speed up your computer and fix display problems on websites.
  • Safari, Chrome, and Firefox all have cache-clearing options in their settings, and the steps differ slightly between browsers.
  • You can set your browser to clear cache automatically when you close it, so you do not have to do it manually.
  • Clearing cache does not delete your passwords, bookmarks, or any files you created — only temporary files the browser stored.

Clearing cache in Safari

Open Safari and click Safari in the menu bar at the top of your screen. Select Settings (or Preferences on older Macs). Click the Privacy tab, then click Manage Website Data. You will see a list of websites that have stored data on your Mac. Click Remove All to clear everything, or select specific websites and click Remove.

If you want Safari to clear cache automatically, stay in the Privacy tab and look for the dropdown menu that says Remove history. Change it from "manually" to "daily" or "weekly" depending on how often you want the cleanup to happen. Safari will then clear cache on its own schedule without you having to remember.

Clearing cache in Chrome

Open Chrome and click the three vertical dots in the top right corner. Select Settings, then click Privacy and security in the left sidebar. Click Clear browsing data. A window will pop up with several checkboxes. Make sure Cached images and files is checked, then click Clear data.

At the top of that same window, you can choose the time range — select All time to clear everything, or pick a specific range like "Last 7 days" if you only want to remove recent cache. Chrome also lets you set automatic clearing: in the same Privacy and security section, toggle on Clear cookies and site data when you quit Chrome, and the browser will clean up every time you close it.

Clearing cache in Firefox

Open Firefox and click the menu button (three horizontal lines) in the top right corner. Select Settings, then click Privacy & Security in the left sidebar. Scroll down to the Cookies and Site Data section and click Clear Data. Make sure Cached Web Content is checked, then click Clear.

To set Firefox to clear cache automatically, stay in the Privacy & Security section and look for History. Change the dropdown from "remember history" to "use custom settings for history." Then check the box next to Clear history when Firefox closes, and Firefox will remove cache every time you shut down the browser.

Clearing cache through System Settings

Your Mac itself stores cache files separate from your browser. To clear these, click the Apple menu in the top left corner and select System Settings. Click General in the sidebar, then scroll down and click Storage. You will see a breakdown of what is using space on your Mac. Click Recommendations and look for an option to clear cache or temporary files — the exact wording varies depending on your Mac's age and operating system version.

Alternatively, you can use a utility like Disk Utility to see what is taking up space. Open Applications, then Utilities, then Disk Utility. Select your Mac's main drive and click Info to see a breakdown of storage. This shows you what is using space but does not automatically clear it — you would need to delete files manually or use a cleaning tool designed for your Mac.

When to clear cache and when not to

Clear cache if a website is displaying old information, if pages are loading slowly, or if you are running low on storage space. It is also worth clearing if you notice your Mac is sluggish overall — cache buildup can contribute to slower performance. Clearing cache is completely safe and will not break anything on your computer.

You do not need to clear cache constantly. Once a month is reasonable for most people, or you can set your browser to do it automatically as described above. If you clear cache and a website still does not work right, the problem is likely something else — try restarting your browser or your Mac instead.

Frequently Asked Questions

Will clearing cache delete my passwords?

No. Cache and passwords are stored separately. Clearing cache removes only temporary files. If you want to delete saved passwords, you have to do that in a different section of your browser settings — it does not happen when you clear cache.

How much space does cache actually take up?

It varies widely depending on how much you browse and which websites you visit. Cache can range from a few hundred megabytes to several gigabytes over time. If your Mac has plenty of free space, cache is not urgent to clear. If you are running low on storage, clearing cache can free up noticeable space.

What is the difference between cache and cookies?

Cache stores images, scripts, and other files to make websites load faster. Cookies store information about your preferences and login status. Both are temporary files, but they serve different purposes. Most cache-clearing tools let you clear them separately or together.

Can I clear cache on just one website?

In Safari, yes — you can select specific websites in the Manage Website Data window and remove only those. In Chrome and Firefox, you can choose a time range (like "last 7 days") to clear cache from a narrower window, but you cannot target a single site. If you need to clear one site's cache in Chrome or Firefox, your best option is to clear all cache from the last few hours.

Should I clear cache before selling my Mac?

Yes. Clearing cache, cookies, and browsing history removes traces of websites you visited and data websites stored about you. Before you sell or give away your Mac, clear cache in all your browsers, then use Erase All Content and Settings (on newer Macs) or reinstall the operating system to make sure nothing personal remains on the drive.