On a Mac, dragging an app to the Trash does not really uninstall it

You can drag an app to the Trash and still not have uninstalled it.

A Mac app installs as a single bundle, the icon you drag into Applications. But as you use it, it leaves small files scattered across your system:

• Preferences
• Caches
• Application support files
• Logs
• Sometimes a login item that keeps running in the background

Drag the app to the Trash, and all of that stays behind in hidden Library folders you never open.

One app is nothing. Years of installing and removing apps is gigabytes of files for software you do not even have anymore.

The leftovers add up fast

On a small drive, this is not a rounding error.

For most of the last ten years, my main machines were a Mac mini and an office Mac, both on a 512GB drive. It filled up fast. I am on 1TB now and still clean regularly, because it pays off every time the disk gets tight.

Two tools do the work. One finds the space. One removes apps cleanly.

AppCleaner removes the whole app, not just the icon

AppCleaner is the cleanest uninstaller I have found, and it is free.

Drag an app onto its window, it finds every related file, and you delete them together in one click.

Here is the whole process:

• Download AppCleaner from freemacsoft.net. It is free.
• Drag the app from Applications onto the AppCleaner window.
• It lists the app plus every file it found: preferences, caches, support files, login items.
• Glance at the list, click Remove, then empty the Trash.

Two things make it safe and effortless:

• It protects the built-in Apple apps, so you will not delete something the system needs by accident.
• Turn on SmartDelete in its preferences, and it catches any app you drag to the Trash the normal way, then offers to clean up the leftovers.

That is the thorough uninstall, without even opening it.

Pair it with DaisyDisk to reclaim space

AppCleaner removes apps, and DaisyDisk tells you which ones to remove.

DaisyDisk scans your drive in seconds and shows what is eating the space as a visual map. When the disk gets tight, my routine is two steps:

• Scan with DaisyDisk to see where the space went.
• Remove the apps I no longer use with AppCleaner, so they leave nothing behind.

Five minutes, and I get the space back instead of buying a bigger drive.

More on that tool in its own post: DaisyDisk.