It's estimated that every year globally, we generate 40 million tons of electronic waste. That's like throwing away 800 laptops every second. Unless you securely clean your free space or wipe your hard drive, there's potentially a lot of recoverable personal data floating around.
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Are you looking to erase the free space on your Mac? You've come to the right place. Data privacy has never been more important, but surprisingly, not everyone realizes that your Mac is not entirely erasing that data when you delete a file.
Did you know? Deleted files are identified as free space, available to be written over with new data. Meaning, they can be fully or partially reconstructed if your Mac ends up in the wrong hands. Unless, of course, you erase your Mac's free space.
- May 17, 2019 How to clean up Mac hard drive space? Here are few tips that would help you to unload your hard drive. Delete unnecessary apps and games. Most of us will have games, apps and other content that is no longer needed taking up hard drive space. Even Mac’s, with as much memory as some of them are equipped with, run out of space eventually.
- Aug 11, 2021 EaseUS CleanGenius is a powerful and easy-to-use cleanup software for Apple Mac users, making your Apple Mac system run faster and free up hard drive space by cleaning up the System Caches, User Caches, System Logs, User Logs, User Downloads, Trash, and Safari Internet Cache, etc. CleanGenius allows enjoying smooth & better system performance.
- No matter which drive your Mac has, let’s look at how to erase your Mac’s free space. Erase your free space. One way to securely erase free space on your Mac hard drive is to use the CleanMyMac X Shredder module. Though the main app is paid, this particular tool is 100% free to use.
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What do we mean by erase
On macOS, secure erase means your data is replaced with a random set of zeroes and ones. In this way files are “shredded” digitally. Which app should you use? There is a free Shredder tool that is a part of CleanMyMac X — you may use this simple eraser to do the job.
Let’s take a look at how to erase free space and securely erase the hard drive on your Mac.
Why erase free space on your Mac hard drive?
Here’s a quick look at some top reasons to erase your Mac’s free space:
You’re selling an old Mac or a used hard drive.
You work with top-secret non-disclosure agreements.
Your Mac has become too expensive to repair, and it’s time to recycle.
You want to be sure your deleted data is really gone.
Sometimes emptying your trash just isn’t enough; We need to remove files securely.
If your Mac has an SSD, Apple claims that erasing free space on your Mac’s hard drive is unnecessary because a standard erase makes the recovery of data difficult.
Not everyone wants to take Apple’s word for it. Standard erase doesn’t make me entirely comfortable that my data can’t be recovered. Luckily there are some options if you’d prefer to take your Mac’s deleted data fate into your own hands.
You can both easily and safely wipe the free space on your Mac to prevent future recovery of deleted files and data.
How to find out if you have an HDD or SSD disk:
Click the Apple icon top left and select About This Mac.
Select System Report and scroll down to Storage.
Now, select the drive from the list at the top and look for Medium Type.
Here you'll discover if you have an HDD or SSD.
No matter which drive your Mac has, let’s look at how to erase your Mac’s free space.
Erase your free space
One way to securely erase free space on your Mac hard drive is to use theCleanMyMac X Shredder module. Though the main app is paid, this particular tool is 100% free to use.
As we’ve said this feature can be used free of charge and it erases files along with their digital footprints, making them irretrievable. Removal of this nature takes a little longer than a quick empty of your trash, but it does ensure that all data gets rewritten, leaving no chance of recovery at a later date.
Tip: Be sure to select files carefully for secure removal. This action is irreversible.
How to erase free space on your Mac with CleanMyMac X:
Download the free version of CleanMyMac X - It’s also notarized by Apple.
Launch the app, and select Shredder from the sidebar.
Click on the Select Files button.
Now, browse which files you want to remove and press Open.
Or you can just drag and drop the file to feed it into the Shredder.
I found it helpful that once the process finishes, you get an update on remaining free space, and you can also view a log of the removed items. I also love the fact this is really simple to use, for quick peace of mind.
Erase a drive using Disk Utility
If you’re planning on transferring ownership or your Mac, Apple recommends erasing the entire disk; this protects you from any standard erased files or data being rebuilt or recovered.
Disk Utility can feel like a scary place to be clicking around. This powerful and notoriously tricky to locate feature can securely erase your Mac hard drive, ultimately preparing your Mac for new ownership.
Tip: Don’t forget to backup any important files you want to keep before erasing a disk.
If you’re trying to erase your Mac’s startup disk, you will need to start up from macOS Recovery first. On your computer, the Startup disk is the main hard drive, and your Mac is using it to run macOS, so it would be unlikely you would be able to erase it without following the next steps.
Startup from macOS Recovery
- Turn your Mac on and quickly press down Command (⌘) and R. When you see an Apple logo or spinning globe, release the buttons.
- If prompted to enter a password, this will be the primary admin account password. The macOS utilities screen will appear, select Disk Utility.
- Once open, select View in the top menu and choose Show All Devices. The disk your Mac started up from will be top of the list. In my example, you can see Apple SSD is the startup disk.
- Select the disk that you want to erase, and click Erase at the top.
- Give your device a new name,select a format. (Disk Utility shows a compatible format by default.) and finally, choose GUID Partition Map and click Erase.
- When it's finished, quit Disk Utility.
If you're not erasing your Mac's main hard drive, then follow these steps:
- Select the Finder icon from the Dock on your Mac and select Applications.
- Now, scroll down to Utilities and then select Disk Utility. You can now follow the same steps as above from point 5.
Final option: If you only need to free up space
There is a difference between “erase” and “free up” when we talk about disk space. If you only need to free up a few gigabytes removing the junk on your drive, that’s much easier to do.
You have 2 options:
1) Use the Optimized Storage feature (a default macOS feature)
This feature is found under Apple menu > About this Mac > Storage > Manage...
2) Use a dedicated junk “destroyer”
The one we’ve told you about is CleanMyMac X. But the same app has another cool feature, called System Junk, that removes clutter in almost astronomical amounts.
It looks like shown below; note how many categories of junk it identifies:
It's up to you to select which option suits your needs. Whether you want to erase free space on your Mac, by selecting which files to remove with a handy tool like CleanMyMac X or opt for the complete drive erasure treatment, it's always good to know your options.
Thanks for reading. Come back soon for more useful Mac tips.
Even with all of the space some Mac users can enjoy - depending on the size of the hard drive you bought — they always run out of room eventually. Sooner or later, a Mac starts to slow down, even overheat, and the space you need is no longer there. Here are ways you can free up space when your Mac hard drive is full.
How to check Mac hard drive space
To start with, it always helps to know what is taking up so much space on your Mac before you start deleting files and folders.
Click on the Apple icon in the top left corner
Select About this Mac > Storage
Another way to see what is taking up space is within System and User files. Next to every folder and application your Mac displays how much space everything uses and therefore makes it easier to judge what to delete.
What system files can be deleted safely?
Depending on your user habits, there could be tons of various junk on your Mac. Some of it can be safely destroyed because these files are either outdated or never been used.
How to find your biggest space hoggers
Yes, you could spend a few hours in Finder sorting your archives and documents. The problem is all folders in Finder look the same. Is there a quicker way to find out where is your space going? Yes, and it's called 'Space Lens.'
Space Lens is an amazing little tool that is part of CleanMyMac X. It creates the interactive map of your storage so you can explore it and at a glance see the largest space wasters. A quick way to see what is taking up so much space, and then in a few clicks, remove and delete anything taking up too much room, or that you've forgotten about and need to clear out.
- Get a free version of CleanMyMac X
- Launch the app and click Space Lens in the sidebar
These 'bubbles' are your folders of different size. You can even find the folders that are regularly hidden away.
How to clean up Mac hard drive space?
Here are few tips that would help you to unload your hard drive.
1. Delete unnecessary apps and games
Most of us will have games, apps and other content that is no longer needed taking up hard drive space. Even Mac’s, with as much memory as some of them are equipped with, run out of space eventually. If “Your disk is almost full” is a problem you’ve encountered, you need to follow these steps to free hard drive space on a Mac.
Go to the Applications folder.
Search through and see what you don't need anymore. Make a list of these, because once they're out of the Applications folder there is a chance you need to check in other places around your Mac to find other traces of the same apps, in case there are folders and system files stored elsewhere.
Drag-and-drop the unwanted apps and games into the Trash.
And then search in Library and other hidden folders for other traces and elements of the apps and games that you’ve deleted. Once you’re sure you’ve got everything, empty the Trash. It is also worth restarting your Mac, just to make sure you've removed everything and your Mac is operating at peak performance again.
2. Clear out duplicates
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Duplicates can be lurking around hard drives in a number of ways.
Usually this is a problem when you’ve copied multiple documents, or more often than not, when you’ve got more than one of the same picture. Or many pictures that are very similar. Another way this is an issue is when you’ve got a Mac that used to have - or inherited from a previous Mac — an iPhotos album. Whereas macOS comes equipped with the Photos app, so there is a risk that your Mac is full of duplicate photos.
Before you delete the ones you don't need, make sure the ones you want are saved in the right folder, or moved over into an external or cloud-based hard drive. Then delete everything that is taking up too much space.
BTW, our favorite app to delete duplicates is Gemini 2 — give it a try.
3. Watch out for backups
Another problem that is commonly encountered on Mac’s are backups from iOS devices. Although most backups are now done in the cloud, there are still millions of Mac’s with iPod, iPhone and iPad backups still taking up hard drive space.
You should be able to find these within iTunes. If you want to delete them, close iTunes then go to the following folder within Library: ~/Library/Application Support/MobileSync/Backup.
Now you can take all of these unnecessary backups to the Trash, then empty it to free up space.
4. Empty Trash and email downloads
Another way to free up much-needed space is to empty to Trash, and clear out months or years worth of email Downloads. Once you’ve emptied the main Trash in the right-hand side of the Dock, it is also worth checking in the iTunes, Photos, Mail and iMovie applications - if you've used any of those recently - as they also have their own Trash functions, so make sure to clear those out too.
Whether or not you use Mail, or a third-party or browser-based email application, downloads go into the same folder. You could be sitting on months or years worth of downloads.
To see your Mail Downloads:
Open Finder, choose Go > Go to Folder...
Type in: ~/Library/Containers/com.apple.<strong>mail</strong>/Data/Library/<strong>Mail Downloads</strong>/
See what's inside and delete it if necessary.
Is Clean My Mac Safe
5. Free up more space with CleanMyMac X
These are several third-party tools you can use to create more space on a Mac. It's entirely up to you to find the best cleaning partner for your Mac — but beware of scam Mac cleaners. When you see 'Your Mac is infected' message, don't fall for it — it's a trap.
But that said, there are also reliable junk removers, like CleanMyMac X. For example, CleanMyMac X is notarized by Apple and doesn't contain any malicious components.
Here is what CleanMyMac X can clean on your Mac:
- Large & Old files
- System Junk
- Unseen applications
- iTunes and Photo junk
Clean Mac Hd
The user interface looks like this:
How To Clean My Mac Hard Drive For Free
According to the developer's site, an average user locates up to 74 GB of junk to clear out using the app.
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CleanMyMac X is available for a free download here
Okay we've told you how to delete your apps, games, photos, and other folders taking up space. Hopefully, you can get your Mac working at peak performance again.