How to remove junk files on mac and free up storage space?

Yes, deleting temporary files is an excellent, completely free way to remove junk files on Mac and free up storage space. 

Temporary files (also called "temp files" or "cache files") are created by apps and macOS itself to help things run faster. For example, when you visit a website, your browser saves images and data locally so the next visit loads quicker.

Here's the problem: Over time, these files pile up—sometimes taking up dozens of gigabytes—and your Mac may slow down because the storage is nearly full.

Before you remove junk files on Mac, back up your Mac with Time Machine or another method . While these deletions are generally safe, a backup gives you peace of mind. How to Delete Temporary System Files from /private/var/folders/:

This is where macOS stores temporary data that apps are actively using. This folder can grow surprisingly large.

• Go to /private/var/folders/
• You'll see folders with random-looking names
• You can delete the contents inside the C and T subfolders

It's better to delete only the dated folders, not everything at once

The safest approach: Instead of manual deletion here, simply restart your Mac. macOS automatically clears out many temporary files during a reboot. One user reported that a simple restart freed up 50GB from this location!