If you are running a version of the operating system older than macOS Sierra, you can manually wade through your drive tossing old files or get a third-party cleaning app to sweep up for you. Click the X next to each file to delete it. To see what the Mac considers “clutter,” click the Review Files button and go through the lists of files deemed large, old or unnecessary. Using the Reduce Clutter feature is another way to find big files hogging drive space and remove them. (In macOS Sierra and later, the system also automatically dumps duplicate Safari downloads, cache files, logs and other unneeded files.) The Empty Trash Automatically setting permanently deletes files that have been living in the Mac’s trash for longer than 30 days. The setting also changes the Mail program’s behavior regarding file attachments to retrieve only recent files - or only those that came with messages you have opened. The cache remembers parts of pages, like images, to help them open faster during your next visit.Enabling the Optimize Storage feature dumps iTunes videos you have already watched, but you can download them again later.They make your online experience easier by saving browsing data. Cookies are files created by sites you visit.Some sites can seem slower because content, like images, needs to load again.If you turn sync on in Chrome, you’ll stay signed into the Google Account you’re syncing to in order to delete your data across all your devices.For example, if you were signed in, you’ll need to sign in again.

If you use Safari, Firefox, or another browser, check its support site for instructions.

For example, you can delete cookies for a specific site. Learn how to change more cookie settings in Chrome.

Next to 'Cookies and other site data' and 'Cached images and files,' check the boxes.

Clearing them fixes certain problems, like loading or formatting issues on sites. When you use a browser, like Chrome, it saves some information from websites in its cache and cookies.

Process to clean up mac computer