You know how you shop for something online and then for weeks you’re seeing it everywhere? That’s because your browser caches hundreds of files that make up the websites you visit. All browsers store your browsing history and cache data from websites you visit. These cache data created by the built-in macOS system services that run your Mac. Every applications creates a lots of cache - it wouldn’t be surprising to clear up gigabytes of space when cleaning app caches. It includes apps that came with your macOS (like Mail) as well as 3rd-party apps (like Sketch). These cache files created by all the apps that you use on Mac. There are three types of caches you can clean on your Mac: One easy way to keep your Mac running its best is to occasionally clean the cache. Your Mac takes care of routine maintenance behind the scenes eventually, but that doesn’t mean you can’t keep things tidy yourself in the meantime. Make your Mac fast and secure with CleanMyMac X.