< The MacPaw How-tos

How to Secure Empty Trash on Mac


How to secure empty trash on Mac OS X and make your data private

That little silver trash can on your Mac’s desktop represents an invisible Mac trash folder. Technically, items in your trash are still on your Mac, as you can drag them right back out. To delete those items, you simply empty the trash. But are they really gone?

In this post, we’ll talk about the difference between “empty trash”, “empty trash securely”, why Apple removed that feature from El Capitan (ugh!) and how to make sure your deleted files are well and truly gone. But, if you don’t care all that much about the what and the why, jump straight to the how: here are two ways to empty trash securely.

The difference between Empty Trash and Secure Empty Trash

When you empty trash in OS X, the files inside aren’t actually erased. The space they occupied is marked by the system as available for overwriting, but the files themselves remain on your drive until they’re overwritten by something else. This means if someone wanted to recover deleted files with special software, they have a chance to succeed, although it’s a tedious process. This is where the secure empty trash feature comes in.

When you empty trash securely, the system writes a series of ones and zeroes over the file you’ve deleted, making it impossible to recover. This feature was an option in OS X until the release of El Capitan, when Apple removed it. Here’s why that happened.

Apple secure empty trash

Why Apple pulled Secure Empty Trash from El Capitan

Here’s Apple’s statement on why Secure Empty Trash was removed from El Capitan:

“Finder Available for: Mac OS X v10.6.8 and later Impact: The "Secure Empty Trash" feature may not securely delete files placed in the Trash Description: An issue existed in guaranteeing secure deletion of Trash files on some systems, such as those with flash storage. This issue was addressed by removing the ‘Secure Empty Trash’ option.”

Why? Because Apple figured they could not guarantee the entire files were being securely deleted on all available systems.

See, the Secure Empty Trash feature was built around hard drive technology, and a lot of Macs use solid state drives now, which store data in a completely different way. On an SSD, each erasable area of memory actually suffers wear-and-tear with each write and erasure. That is why, special management software monitors memory use across the drive, rotating through available writable units. Because of that, it’s possible that certain data will be missed by the secure empty sweep.

Why all the technical mumbo jumbo in this article? Because it explains why Apple removed secure empty trash from OS X El Capitan, and allows us to introduce alternate methods. It’s still possible to securely empty the trash on your Mac.


How to secure empty trash in OS X El Capitan

There are two ways to securely remove files. The first isn’t for the faint of heart, the latter is simpler and safer:

1 Terminal

Before we begin, a note. You can make a mess of things with Apple’s Terminal. It’s crucial to understand the commands and type them without errors. If you start to sweat a bit just reading this, move on. There are alternatives. Otherwise, here we go.

First, open Terminal. You’ll find it in Finder > Applications > Utilities. Now, type the following command, then leave a space after the “v” and lastly, drag the file you wish to delete after the space:

srm -v

Hit return. Your file is gone. Of course, you’ll have to repeat the procedure for each individual file, so it’s not exactly emptying the Trash bin with a click. If Terminal doesn’t sound like an option for you, let’s try something else.

2 CleanMyMac 3

Fortunately, you can empty trash securely in a click with CleanMyMac 3. Not only does it empty your desktop trash, but it also cleans up all the other trash bins on your Mac, including those most often overlooked.

Multiple trash bins? Yes! For example, Photos has its very own trash. When you delete an image from Apple’s Photos app, it’s actually moved to the Photos trash. You won’t see it in your desktop trash can. The same goes for Mail, Aperture, external drives and more. Even if you forget about theses bins, CleanMyMac does not. So, let’s take a closer look at how you can empty all the trash bins securely with CleanMyMac 3.

Once CleanMyMac is running, click the “Trash Bins” icon on the left hand side, and then hit Scan. CleanMyMac 3 browses all the trash bins on your drive and in your apps, finds everything that can be securely removed, and shows you a list of what it has found.

Force and secure empty all trash bins on your Mac

After completing a scan, you can browse what’s been found, and easily de-select any file you’d rather keep. For a more detailed view, click Review Files to see what’s been identified in each individual trash bin. If you’d like to inspect a file itself, just hover your cursor over its name and then click the magnifying glass icon to open that item’s enclosing folder.

Finally, we’ve been talking about securely removing files once and for all, so let’s do that with CleanMyMac 3. Right next to the Empty button is a drop-down menu. Click it and select Remove Securely. This takes more time, but it overwrites all relevant data with ones and zeroes, making recovery nearly impossible. Goodbye, embarrassing email! It has been securely and safely removed.

Even though Secure Empty Trash is no longer a native function in OS X El Capitan, you can still empty your Mac’s trash securely with CleanMyMac 3. Download CleanMyMac free and be sure the files you delete are really gone.

CleanMyMac 3
How to clean and optimize your Mac?
That's easy. With CleanMyMac 3.
Download Free