This Totally Free App Can Free Up Space on Your Mac
To get started, download Purge and install it. Open the application, and it will show you what's taking up space on your Mac.
If you want, click the Clean Safe Items button, and the app will handle it, assuming you trust it. I recommend paying a bit more attention, though. First, delete some caches. You'll see a list of caches, all of which are safe to purge periodically.
You'll also see Apple's Aerial screen savers here. These videos are very cool, but take up a lot of space—delete them if you, like most 21st-century people, don't use a screen saver.
There's also a Dev Tools section, which isn't relevant for most people. If you use Homebrew, though, don't skip this—it's an easy way to delete cached installation files you don't need anymore.
The next tool shows you only the largest files on your computer, likely videos or other large media....
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