A new iMac can easily have 500GB to 1TB of storage space. The average MacBook has about 250GB. That’s a lot of space when you consider how far hard drives have come. However, even with that much available memory, given the size and scope of graphics programs and files, you may find that you need to know how to free up space on Mac. Delete Large Files on your Mac. Instead of deleting a hundred small files and images, first of all, let. Use an automated Mac cleaner. Probably one of the easiest and fastest ways to clean up your Mac to free up space is to utilize an automated cleaner such as Outbyte MacRepair. Automated mac cleaners are designed to clean up your disk from time to time, checking for unnecessary and outdated junk, caches, files, programs, backups, language packs.

A slow Mac is no fun for anyone. It happens to the best of us — which is why everyone should know how to declutter and free up disk space on their Mac. Not only will this speed up your computer, it’s also a great opportunity to organize your files.

Clearing disk space on a Mac can make your computer feel like new. Over time, most Macs, especially those that experience regular use, get full of documents, files, apps, images, videos, and other junk and clutter.

In this article, we’ll show you how to free up space on Mac computers, and highlight some apps that make maintenance of your computer’s file system much simpler.

What's taking up space

Have you ever seen this pop up on your Mac?

It’s frustrating! This occurs because the memory your Mac has is full. It may be saved movies, large documents, mail attachments, or just plain cached items from apps like iMessage that are taking up space on your Mac.

Not only is the popup message annoying, diminished disk space on your Mac can prevent you from being productive. Mail attachments or other files may not save to your Mac, all because you’ve got a bunch of old stuff cluttering your memory system. It can even cause apps to quit, or fail to load.

Low disk space isn’t always an 'old Mac' problem, either. While it’s true older Macs typically have less memory available to them, even modern Macs can get cluttered. That’s why it’s important to know how to clear space on Mac hard drives.

How to check storage on Mac

Here’s how to check the storage on your Mac using Apple’s method:

1. From the menu bar on your Mac, click the Apple logo on the top left
2. Select 'About this Mac'
3. Select the 'Storage' option in the new window

This is a basic way to check how much storage is being occupied on your Mac. Another good tip is to check your disk usage with iStat Menus. It’s an app that allows you to monitor – in real time – how your Mac is performing. iStat Menus lives in your Mac’s menu bar, running in the background until you need it. Each of its monitoring services has a menu bar icon, including one for memory.

When you click on the iStat Menus icon, it shows you exactly what’s happening with your disk space. When your Mac is running slowly, it’s possible an app is taking up more resources than you would like. iStat Menus shows you which app is to blame.

How to optimize storage using macOS

If you’re using macOS Sierra or later, you can benefit from Apple’s Optimize Storage functionality. It allows you to store files in iCloud, renewing your access to these files whenever you need. Here’s how to use the Apple way of managing storage on Mac:

1. Repeat the steps above to check the available and used storage on your Mac
2. Click on 'Manage' to access the storage management window
3. Enable the 'Empty Trash Automatically' and 'Reduce Clutter' options to remove files you deleted, and large files you might no longer need.
4. Select 'Store in iCloud' to move your desktop file and docs, photos, and messages to iCloud. You can choose what file types to transfer.

Note: iCloud provides only 5GB of free storage. If you want more, you can upgrade your iCloud storage plan — it will cost you $0.99 per month for 50GB, $2.99 per month for 200GB, and $9.99 monthly for 2TB.

Go to the Optimize Storage menu and choose from three options that help you use storage more cleverly. You can select to remove watched files from your Apple TV app (or iTunes if you use macOS Mojave and earlier), download only recent attachments, or not to delete attachments at all.

Move Files to the Cloud

iCloud is Apple’s preferred method for storing files and folders in the cloud. It makes your data available across devices, and is now the default service for system backups.

Apple gives you 5GB free iCloud storage, but it’s just enough for an iPhone backup and a few gigabytes of pictures. It’s almost never enough for the average user.

Activating it on your Mac will help save room in your system memory, though. It moves the actual storage of files to the cloud, and ann image of those files on your Mac. It also compresses images for optimized storage on the Mac, but keeps them available in the Photos app.

If you have a different cloud storage system you prefer, CloudMounter makes it easy to back your Mac’s files up to Google Drive, Dropbox, OneDrive, Mega, Amazon S3, and other services. It lives in your Mac’s Finder app and menu bar, and makes moving files from your Mac to the cloud as easy as dragging and dropping them into CloudMounter, and directly into your connected cloud account.

Manage large files and archive data

You can find and delete large files on your Mac directly. Here’s how:

1. From the menu bar on your Mac, click the Apple logo on the top left
2. Select 'About this Mac'
3. Select the 'Storage' option in the new window
4. Select 'Manage'
5. Select 'Documents'
6. On the right side of the window, click the 'Size' column header to show the largest files first

We prefer using CleanMyMac X’s file system manager. Here’s how to use it:

1. Open CleanMyMac X on your Mac
2. Select the 'Large & Old Files' module on the right side of the window
3. Select 'Scan'

This is a smarter way of discerning which files are taking up space on your Mac – especially if you don’t need access to those files often. It shows you which types of files they are, how old they are, and lets you delete batches of files by size.

Find and delete duplicate files

When you download an app, it usually has associated files it stores on your Mac. That’s normal; duplicates of those files aren’t. Downloading an app more than once, or even updating an app, can cause it to duplicate existing files on your Mac.

You may also download files more than once. Your Mac is smart, but doesn’t bother checking to see if you already have a file before downloading it again. There’s no clean way to check for duplicates on your Mac. Apple would ask that you look for duplicated filenames in your storage, and delete one of them.

A better way is to use Gemini, an innovative cleanup app built to help you find and eliminate duplicate files on your hard drive. Even better, it can identify near-identical files as well, giving you an easy way to delete the slightly shaky versions of your vacation snaps in one convenient window.

Here’s how to detect and delete duplicate files with Gemini:

1. Open Gemini on your Mac
2. Click the ‘plus’ icon, or drag a folder to the app
3. Select 'Review Results' to delete files manually, or 'Smart Cleanup' to allow Gemini to delete all duplicates

Remove temporary files

Your macOS, your apps, and your browser all use a shortcut called 'caching' to run faster. But over time, those caches fill up with useless information that bogs down your computer.

Why is it important to clear the cache? The short answer is that caches litter and bloat Macs. They aren't just a byproduct of browser history — most systems and apps, such as Pages, Numbers, Keynote, Mail and Photos, create huge amounts of temporary files that linger in the background. These caches of data are essentially just junk files, and they can be safely deleted to free up storage space.

When it comes to cleaning a Mac, you have two options: delete files manually or get a cleaner app to help you. Clearing your cache files with CleanMyMac is the quickest, safest way we know.

Get rid of hidden trash

Another source of system-slowing junk is email and text attachments. Even if you don’t download an attachment, your desktop mail client holds onto a version so that it can show you previews and access the file more easily. 'But I deleted that email!' you say. Often that’s not enough—these downloads can hang around long after the original email is gone.

It’s possible to clean them out manually. You can use the macOS Optimize Storage feature we’ve described above. Choose what exactly you want to be removed — mail attachments, watched video, or both. Still, CleanMyMac X is a much faster option to clean up the trash on Mac. Here’s how to use CleanMyMac X to empty all trash folders on your Mac:

1. Open CleanMyMac X on your Mac
2. Select 'Trash Bins' from the left hand side
3. Select 'Scan' at the bottom of the window
4. Select 'Review Details' to see what CleanMyMac X found, or 'Empty' to delete all trash files on your Mac

Here’s a little trick for you: If you want to be sure you keep the needed files and attachments at your fingertips, use Trickster app to remember them for you. Configure your file tracking inside the app and make sure you’re never confused about what’s stored on your Mac. The important stuff is always in Trickster.

If you want a clutter-free email client, Canary Mail is your perfect choice. The app not only automatically clear away the trash, but also allows to automatically unsubscribe from tons of mailing lists — so that you stop receiving the clutter.

Empty downloads and trash bin

Your Mac’s ‘download’ folder is where most apps, like Safari or Chrome, dump files. It’s also the default folder for email downloads. And it can get really full.

Many of us simply download a file, access it, then forget about it once we’re done with it. The downloads folder can get chock full of files we no longer need, or want. It’s smart to comb through it ever so often and delete files you don’t want, or move them to cloud storage containers using CloudMounter.

Some downloads are hidden, taking up even more space. And the further back you go the more useless these documents are. Do you really need to keep a text file labelled 'Christmas shopping list 2015' or 'Dream holiday Summer 2016?' Probably not. Free up some much-needed space on your Mac and delete as many of these old download files as possible, and remember to come back and tidy it up every few months.

CleanMyMac can help for sure. But also, consider switching your email client to Unibox, which automatically reduces excessive downloads.

AppleInsider described Unibox as 'the best client we tried,' and Macworld said it is 'A welcome, fresh new approach to email on the Mac.' Unibox groups emails by sender and includes an attachment list, so you can quickly find what you need, then delete those documents out of the Downloads folder.

Uninstall unused apps

Have you ever downloaded an app, then stopped using it? We all have! Those apps occupy memory on your Mac – sometimes a lot of space, too.

CleanMyMac X has a handy 'Uninstaller' module which makes it easy to identify and remove all unwanted apps from your Mac. It even deletes associated files, so all traces of an unused app are taken away.

Get rid of old backups

Something else that comes as a surprise to most Mac users is just how many backups your system carries at any given time. Copying and pasting, and the duplicate feature make it too easy to replicate your work in different folders.

At the same time, you’ve probably got dozens of cached backups of files and documents that are invisible but taking up more space than you’d want. Like Time Machine backups. Every time you use Apple’s built-in backup utility, it creates local snapshots that are stored locally on your Mac. This may result in up to 100 GB Time Machine clutter on your hard drive.

CleanMyMac will find old backups for you and remove them in a click. In its 'Maintenance' module, you can select 'Time Machine Snapshot Thinning' to automatically remove older Time Machine backups you no longer need.

But also, switch your backup client to Get Backup Pro to backup only those units you want (for Mac). If you need to quickly transfer files or folders to another server, use a backup sync app ChronoSync Express.

If you want to quickly backup your iOS device on Mac — for instance, before hard resetting or factory resetting iPhone — you can use AnyTrans. You can even schedule instant backups to never worry about losing data when syncing your iOS device with Mac.

Get rid of desktop clutter

Organizing your Mac desktop doesn’t directly help your memory woes, but it can help you find files faster and avoid multiple downloads of the same file.

Apple’s chosen method is called Stacks. A simple right-click on your desktop brings up a menu; selecting 'Use Stacks' puts your files into folders by type. Images, screenshots, and other files will be held in expandable folders, decluttering your desktop for good. Future downloads will all fall into those categories, too.

You may prefer Spotless, an app that affords you far more control over how your desktop is organized. You can set rules for organization, and tuck files into other folders on your Mac by dragging and dropping into one location. Spotless takes care of the hard work for you!

You deserve a faster Mac

By eliminating both hard disk and desktop clutter, you’ll improve your Mac’s performance as well as your own workflow. Plus, Setapp’s decluttering, disk cleanup, and analysis apps help you complete what would be a tedious chore in just a few clicks. There’s no telling how much time and effort you’ll save by giving yourself (and your Mac) a break.

There are plenty of great ways to manage your Mac’s memory without rushing out to buy a new computer. We’ve shown you the best ways here!

All the apps we mentioned in this article are available for free during a seven day trial of Setapp, the world’s best suite of productivity apps for the Mac. In addition to ClanMyMac X, Spotless, Gemini, CloudMounter, Get Backup Pro, and ChronoSync Express, you’ll have unlimited access to Setapp’s full catalog of nearly 200 Mac apps. When your free trial is over, Setapp is only $9.99 per month. Give it a try today!

Meantime, prepare for all the awesome things you can do with Setapp.

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A full startup disk is something that every Mac user will experience. This problem used to be known as “Startup disk full” notification. However, on newer macOS versions this message has been changed to “Your disk is almost full.”

But luckily, it’s a problem that has many solutions. And in this article, we’ll go over:

• What is startup disk full?
• What's causing 'Your disk is almost full' alert?
• How to fix startup disk full?
• How to prevent 'Your disk is almost full' problem?

However, we also understand that some people are short on time and just want to fix startup disk full. So, if you’re not really interested in what it is and why it happens, just skip the next two sections and head to “How to Clean Your Startup Disk”.

Or, even better, if you’re looking how to clear space on Mac, we’d highly recommend a utility called CleanMyMac X. It'll help you clean up gigabytes of disk space in just minutes (you can download it here).

Note: if you’re running macOS Sierra (or higher), it has a built-in option of Optimized Storage that is supposed to solve the problem of the full hard drive by moving files into the cloud.

By clicking 'Manage' you can open the menu and see what Optimized storage offers. However, it moves junk and useless files to the cloud together with your files, and eventually, you end up paying for iCloud storage to store junk. So we still recommend getting CleanMyMac and actually dealing with extra files rather than simply moving them.

Now, with all that said, let’s get into what exactly “Your disk is almost full” means.

Understanding What “Your Disk is Almost Full” Means

What is a startup disk?

A startup disk, as taken from Apple Support article, is a volume or partition of a drive that contains a usable operating system. Still confused? Let’s break it down for you.

Your Mac hard drive consists of disks (or partitions). Each disk (or partition) has your Mac data on it, which consists of your operating system, applications, etc. Most Mac users have just one disk but power users may have two or more.

Let’s look at an example of a Mac with only one hard disk:

• Your Mac's hard drive is 500GB.
• It has one 'disk' on it, so all 500GB of storage is on that disk.
• The disk has an operating system (OS X El Capitan), and user data (apps, etc).
• And since you only have one disk, this is your startup disk: all 500GB.

A Mac with two disks will have the storage divided between them. The Mac drive with the OS on it is the startup disk while the other drive is just used for storage of files. It’s possible to have multiple startup disks, but most Macs will only have one.

Why your disk is almost full?

This is easy. It’s a lot like why is your fridge full? There is no more space! Your disk is almost full and this is very bad news for any drive. A hard disk should never get beyond 85% capacity (especially a startup disk) as you will experience slowness and errors the further you get above that mark.

If your startup disk is full and you get a message of warning from your Mac, this is a serious indication that you need to clear up storage immediately.

What to do when your disk is almost full?

So how do you fix your almost full startup disk? The same way you solve the problem of a packed fridge - you need to clear up storage, of course. To make more space on your startup disk you will need to:

1. Delete files from your Mac.
2. Move files to an external hard drive or cloud storage.
3. Or install a second internal hard drive on your Mac.

So, now that we know what a startup disk is, we need to talk about how to fix it. Let’s take a closer look at your disk space to see exactly what is causing your disk to be almost full.

What’s Causing 'Your Disk Is Almost Full' Alert?

Short version: Take a look under-the-hood of your Mac.

Before we can see what is taking up space on your startup disk, first we have to find it:

1. Hover on the Dock at the bottom of your screen and open Finder.
2. Click on “Finder” in the menu bar at the top of your screen.
3. Then select “Preferences…”
4. In the window that opens, checkmark the “Hard disks” checkbox.

After selecting this box, your desktop should now show the hard disks on your mac, in the form of icon(s), like this:

These are disks on your Mac that you can “startup”, this is because they have operating systems on them. If there is more than one of these hard disk icons that show up on your desktop, it means you’ve got multiple hard disks on your Mac. If you only have one, skip the down to “What is taking up all of my startup disk space?” section.

If you have more than one, continue with the next step:

Click on the Apple icon at the top left of your screen System Preferences > Startup Disk.
Here, again, you’ll find your hard disk(s); they’re probably named something like MainSSD or MainHD. It will also display “OS” and the version number of that OS. If you have more than one OS drive, your startup disk should be the one with the latest version of macOS running on it, but we’re going to make sure of that in the next step.

I only have one and it looks like this:

To make 100% sure that you know what drive is your startup disk, follow these steps:

1. Click on the Apple Icon in the menu at the top-left of your screen.
2. Select “About This Mac.”
3. Under macOS, you’ll find a version number. Mine is 10.15.1, like so:

See how my version number in the “About This Mac” window matches the number in my Startup Disk section? Yep — That’s my startup disk. Found yours? Good.

What is taking up all of my startup disk space?

Now that we’ve identified our startup disk, let’s take a closer look at how to clear up space on Mac:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose “About This Mac.”
3. Click Storage.
   Note: If you are running an older version of OS X you may have to first click “More Info…” and then “Storage”.

Take a look at my hard drive disk:

I’ve got 500GB of storage, and about 275GB of it is free.

So, how big is your hard disk? How much free space do you have (if any — *gulp*)? And what’s taking up the most space? It is important to consider drive capacity and data storage needs for future storage plans — we’re not just here to fix the problem, for now, we’re going to make sure you never have this problem in the future as well.

Now that we have the knowledge, it’s time to take action and fix your Mac’s “Startup Disk Full” problem.

Let’s go over 11 things you can do to help fix 'your disk is almost full.' These should also give you other ideas as to how else to fix it — You know your Mac better than we do!

1. Clear system storage on Mac

System storage cleanup sounds like a serious undertaking. But, technically, it boils down to just one thing: having the courage to scrap the old files.

1. Search for large ZIP/RAR archives in Downloads
2. Open your Desktop (Command + F3) and delete screenshots
3. In Applications, sort your apps by size. Delete the largest ones
4. Get rid of system junk files with a free version of CleanMyMac X
5. Restart your Mac to free up RAM.

2. Clean up cache files on your Mac

Cache files are files that help your Mac run programs a bit more smoothly. Think of them like blueprints for a house: your Mac has the blueprints for how a program is supposed to load/run/look, so it loads it faster; without them, it’d be like building it from scratch. However, over time, these caches can start to take up some serious space. Periodically, removing them can help clear storage. And don’t worry, your Mac will create fresh, new ones after you restart your Mac. To remove caches:

1. Open a Finder window and select Go in the menu bar.
2. Click on “Go to Folder…”
3. Type in ~/Library/Caches
   Delete the files/folders that are taking up the most space.
4. Now click on “Go to Folder…”
5. Type in /Library/Caches (simply lose the ~ symbol)
   And, again, delete the folders that take up the most space.

Deleting cache files is generally safe for your Mac. And once you delete them, the applications and processes you run on your Mac will generate fresh, new ones. But, when deleting, worry more about removing them based on size rather than just removing all of them.

Also, you can check the /System/Library/Caches folder as well, but it might be better not to touch this folder without knowing what the items are. A utility that correctly cleans up these files (and pretty much everything else on this list) is, you guessed it, CleanMyMac X. It cleans up even your system caches with just a few clicks.

Oh, and once you’re done with this list, restart your Mac so it can create these new cache files.

Read more: How to Clear Cache on a Mac?

3. Get rid of localization files

Localization files are also known as “language packs.” Lots of apps come with other languages that you probably don’t need. To clear up space on your Mac, delete the ones you don’t need:

1. Open a Finder window.
2. Go to Applications.
3. Ctrl+click on an application.
4. Select “Show Package Contents.”

From here, go to Contents > Resources and look for files ending in .lproj. These are the languages your app has just in case you want to use it in another language, like Spanish (es.lproj). Drag the ones you’ll never use to the Trash.

Again, a safer alternative to this would be to use CleanMyMac X. It gets rid of all of them with a click. No digging through application folders, just a cleaner Mac.

Read more: How to Delete Language Files from macOS?

4. Delete duplicate files

Even if you have the most organized Mac on a planet, duplicates happen one way or another. It can be a file you’ve mistakenly downloaded twice or a mail attachment you’ve opened several times. Regardless of how they appeared, those files sit on your Mac and gobble up storage.

But finding and deleting them is a time-consuming process if you do it one by one. So here’s what you can do to save up time:

1. Open the Finder app on your Mac
2. Move cursor over File and click New Smart Folder
3. Click the “+” button in the upper right corner and choose the type of files you want to see
4. Now sort them by name to quickly spot duplicates.

Remember to pay attention to the date of creation to make sure you keep the true original, not the copy.

While this is the best way to remove duplicates manually, it takes lots of your time and dedication. It’d be much easier to leave this to Gemini 2: The Duplicate Finder.

This app quickly scans your Mac for duplicate and similar files and allows you to delete them within minutes. It keeps your originals safe and helps you easily retrieve files deleted by accident.

5. Remove old iOS backups

Backups can tend to take up a lot of space. You can find and remove them by:

1. Launching a Finder window.
2. Clicking “Go” in the menu bar.
3. Selecting “Go to Folder…”
4. Then, type in ~/Library/Application Support/MobileSync/Backup/

Get rid of all the old, outdated backups your Mac has been storing for a bit more extra space.

6. Remove iOS software updates

You can find all the unnecessary data for your devices by:

1. Opening Finder.
2. Selecting “Go” in the menu bar.
3. Clicking on “Go to Folder…”
4. And entering for iPad ~/Library/iTunes/iPad Software Updates
   or entering for iPhone ~/Library/iTunes/iPhone Software Updates

Delete downloaded files for any of the devices that you are not using anymore, or ones which software just already updated. Remember that after any of your devices have been updated, you don’t need those files.

Read more: How to Delete iOS Software Updates from Mac?

7. Remove unnecessary applications

This isn’t often overlooked, but definitely under-appreciated. Removing old, unused applications is a great way to get some extra space on your startup disk. Go through your applications folder and get rid of all the apps you rarely use. But make sure you remove them correctly, don’t just drag them to the Trash. If you do, you’ll leave behind tons of leftover parts and pieces, and we’re trying to get back startup disk space — It’ll kinda defeat the purpose, no?

This is another place we’d suggest using CleanMyMac X. To completely remove any application, just launch CleanMyMac X, click Uninstaller, select your application, and then click Uninstall. You won’t have to search all over for development junk that’s left behind when Trash’ing an application. It’s incredibly easy and saves you tons of time.

8. Clean up your photo library

Photos, photos, photos. Talk about tons of space! First and foremost, select only what you can get rid of, like image copies and maybe some photos that were mistakenly taken. You know, ones of the ground or something?

Ok, once your own files are taken care of, it’s time to get rid of the files your system created. In Photos for Mac, it’s cache files. In iPhoto, it’s service copies. Both are a pain to find, but here’s how you can get rid of them.

Photos cache includes iCloud local copies (created when you view pics from your iCloud photo library on a Mac), Faces cache (generated when you use Faces), and other app-related caches. You’d be surprised how much all that takes up if you regularly use Photos. For OS versions prior to macOS Sierra, here’s the path to locate the cache:

1. Open Finder and navigate to your Photos library (normally, it’s in the Pictures folder).
2. Ctrl+click your Photos library, and select “Show Package Contents.”
3. Open resources, and then modelresource.

You should now see a lot more folders in your Finder window. Photos cache sits in these folders, but the tricky thing is that it’s really hard to say what is safe to remove and what isn’t. Deleting the wrong file can compromise the performance of Photos, which is why we highly suggest you use CleanMyMac X to clear the cache and system junk. It only removes files that are safe to delete, never a critical file or important image.

You can download CleanMyMac X for free and see how it works, it’s so much safer than cleaning up system junk manually.

9. Clean up your Downloads, Movies, and Music folders

Have a closer look at these three folders. You’d be surprised at how many downloads can accumulate when you aren’t paying attention. Clean out anything you don’t need (or don’t know) and organize the rest. It’ll take a load off your mind to know that there’s nothing excess there.

The Movies folder can be a pain, not because you’re searching through tons of files, but it can be difficult to choose what to delete. Personally, I never want to get rid of Top Gun. It’s amazing. I watched it 3 times in a row last weekend. But alas, sometimes you need to make sacrifices for the health of your Mac. Though, what you can do with movies you want to keep is to archive them. So, archive what you wish to keep and remove the rest.

How to archive/compress a file

Archiving a file doesn’t mean to store deeper into the abyss of your Mac — but to turn the file into something smaller, into a compressed file (like .zip or .tar). By archiving a file, you shave off some memory. Archiving is essential for things you want to keep on your Mac, but don’t often use, and helps you clear up some space. And that’s what this is all about right? We’re essentially doing the hokey-pokey on your Mac. To archive a file, just:

1. Ctrl+click the file you want to compress (recommended for movie files).
2. Select, “Compress .”

Macbook Storage Full

The last place to sweep through is the Music folder. Find and remove duplicate music files first, and then clean up all the songs you downloaded on a weird Sunday afternoon cleaning the house.

10. Clean your Desktop

“Clean my desktop… but why?” Because some people’s desktops are hard to look at, that’s why. Organize your desktop and get rid of the stuff you just don’t need on there. It looks better and helps your Mac act a bit faster (I don’t know the rocket science behind this one, but it feels too good to be false). Your Mac doesn’t waste time loading all those icons and junk, just… Just clean it, please.

11. Empty out the Trash (No, we’re not joking…)

Seriously: It may sound incredibly basic, but it could clear a surprising amount of storage. I forget to do it all the time. The thing is, that when you delete something, your Mac doesn’t remove it — it just moves it to the Trash. Plus, you’ve probably deleted way more than you realize, and all that could be sitting in the Trash, wasting space. So get rid of all that junk by emptying the Trash:

1. Ctrl+click your Trash in the Dock.
2. Select “Empty Trash.”
3. And click “Empty Trash.”

And, the easiest step is done.

A few more tips to clear storage on Mac

1. Manage your Optimized Storage

This option comes with your operating system starting macOS Sierra. Go to the Apple menu > About this Mac > Storage

Now, click on Manage to reveal the space-saving options:

2. Erase your Junk Mail

Open your Mail app, and click Mailbox in the upper menu. Here you can erase spam and already deleted items.

Free Disk Space Mac

3. Delete system junk with CleanMyMac X
Again, this is an incredible utility when it comes to cleaning your startup disk. And this app is notarized by Apple, meaning it's safe.

To avoid the annoying “your disk is almost full” error, download the free edition of CleanMyMac X.
Once you've installed the app, click on the System Junk tab. It will clean up caches, logs, language packs, binaries, duplicate photos, outdated backups, Trashes, and more.

Full Startup Disk Prevention

We’ve cleaned up a few things on your Mac, and hopefully, it’s given you more ideas as to what else you can clean. But, let’s take a look at how much space you saved from cleaning the list above. Remember how we checked your Mac’s free space? Open that window again and see how much space you’ve cleared up:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose “About This Mac.”
3. Click Storage.
   Note - If you are running an older version of OS X you may have to first click “More Info…” and then “Storage”.

You’ve probably got a bit more space, and you’ll want to keep it that way. The only way to prevent a “your disk is almost full” is by keeping your Mac clean. We’d recommend a complete cleaning every 2–3 weeks.

Free Up Space On Macbook For Big Sur

Say goodbye to the 'Your startup disk is almost full” message.

So, we’ve now covered everything that we wanted to share with you. Hopefully, this has helped you fix that full startup disk problem. Your startup disk should now be quite a bit lighter (we hope). Oh, and if you liked this article, get social with it to help others in need. And if you really liked this article, subscribe to our email list — we’ve got more guides on the way. And we’ve also got a utility that’ll help you out a ton in the long run: CleanMyMac X. It helps you clean your entire Mac with just the click of a button. It’s incredibly easy to use and works like a charm.

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