Home > Mac Viruses > “Your startup disk is almost full” Mac Error – How to Remove It

“Your startup disk is almost full” Mac Error – How to Remove It

Today is one of those days when your computing doesn’t work as fine as usual. After starting your Mac you have encountered an extremely disturbing pop-up message that alerts you the following – “Your startup disk is almost full”

your startup disk is almost full pop-up on mac

You probably get that feeling that this is not cool. Don’t worry we prepared this guide to reveal all important details about this disturbing issue as well as several fixes that are proved to be efficient against it.

What Is a Startup Disk?

Let’s start by explaining the main term in this Mac error message. The startup disk is the hard drive that stores the operating system. Hence, it is the most important disk of all. So in the event that you encounter a pop-up that alerts “Your startup disk is almost full”, it basically means that your primary disk drive is running out of space which is very bad news.

What Does the “Startup Disk Full” Mac Error Mean?

The meaning of this message should be understood literally. What does the full error message say when it pop-ups on Mac? Here is a copy of its text:

Your startup disk is almost full.
To make more space available on your startup disk, delete some files.
Don’t warn me again about this disk.

The “Your startup disk is almost full” message means exactly what it says. Your startup disk is running out of storage and you should definitely not ignore this message. Otherwise, you may end up having even more serious issues that prevent you from using your Mac.

This error message often appears due to the fact that you are having too many files that occupy your Mac’s hard drive. This, in turn, brings the free disk space to a dangerously low level. As a result, you may not be able to start your computer or it may become sluggish due to lack of enough operative space for the operating system.

How Do I Fix and Remove “Your startup disk is almost full” Error on Mac?

First, you need to discover what is taking up all the space on your startup disk drive. To see how your space is being used follow these steps:

  • Click on the Apple Icon.
  • Select About This Mac.

About This Mac menu

  • Click Storage (or More Info).

The Storage tab will show you a graphical display of all main categories files that are stored on your drive as well as exact information about the memory size different categories took on the drive. This information may help you to determine where to start the disk cleanup process.


To remove “Your startup disk is almost full” error on Mac you should delete some files and increase the amount of free space available for your system. The options for you are the following:

    1. Remove some files manually
    2. Use a special app to find unneeded files and clean up startup disk
    3. Upload some of the biggest files to the could or a backup disk and remove them from the startup disk

Remove “Startup disk is almost full” Manually

Oftentimes, the biggest space eaters are the files contained in the category “Other”. Files there are usually caches, archives, logs, disk images, plugins, cookies, extensions and so on.

The manual process will take some time. You should be very careful while completing the manual steps because, in the event that you inadvertently delete a file that is essential for the proper operation of your system, it may crash. If you don’t feel comfortable with the manual process of fixing “Your startup disk is almost full” error, then navigate to the automatic approach.

Delete Unnecessary Apps

Probably some of the apps you installed on your Mac are no longer of use to you. Go find these apps and delete them. We recommend that you perform a complete uninstall process instead of just moving the unused apps to the Trash. Surely, the second approach will save some space and time but the first guarantees that all storage used by these apps will be cleared.

Delete Old iOS Backups

If you have the practice to back up your iPhone or iPad using iTunes on your Mac, then you may have lots of old backups that are taking storage on your startup disk. To clean all old and unnecessary backups go to iTunes and navigate to preferences. You will see all the old backups that are stored on your machine. Select and delete all older backups you don’t need. Make sure to keep the most recent one as it is still essential to have reserve copies of all files and settings on Mac. One never knows what will come next.

Lots of nasty unwanted applications are lurking on the web. A recent example is the Calendar Mac/iPhone Virus Notification type of threats. They hijack users’ devices and flood Calendar apps with intrusive annoying notifications. Sometimes the only way to get rid of such annoying apps is to reset the whole system. In such an event you will definitely need a recent backup that will restore saved data in a matter of minutes.

Clean Up Your Downloads Folder

Which is your default Download folder? Find it and make sure to revise all files stored there. The Download folder contains all files which we download from the Internet. Here’s why it can become extremely large in size over time. Cleaning up all files you downloaded from various websites and never used afterward can return some critical space for your operating system.

Get Rid of Mail Downloads

Do you know that whenever you view an email attachment, your macOS Mail app saves a copy of this attachment in a separate folder? Well, now is the time to find that folder and clean data stored in it to get rid of that nasty “Your startup disk is almost full” Mac error. Go to the Spotlight and search for Mail Downloads. You may be surprised how much data has been added there.


Empty Trash

Finally, it is time to open your Trash and clean everything you added there. Since it often takes lots of disk space you should regularly empty it. So, go clean your Trash now and free some space on the startup disk.


Remove “Startup disk is almost full” Automatically

Checking various locations on your Mac including the home, Apps, Trash, Downloads, etc. for unnecessary files or apps is a time-consuming process for sure. The good news is that there is a much faster way to reduce the amount of storage on your startup disk. By using the help of an advanced anti-malware tool with an integrated Disk Cleaner feature you can perform a disk cleanup process just in a few minutes. With only one click you will clean application caches, downloads, application logs, trash, and other obsolete files and regain valuable disk space.

Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it from viruses in the future.


Combo Cleaner

After you download and install the program, open it on your Mac and navigate to its Disk Cleaner tab. There you will find all the unnecessary items. Mark all different types of files you want to remove and click the Remove button to get rid of them.


With the help of the presented steps, you should fix the troublesome “Your startup disk is almost full” error message on Mac. If you don’t you risk that next time you power on your Mac, it won’t start at all.

Gergana Ivanova

Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.

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Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

How to Remove from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove


Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.

5. You can recognise Safe Mode by the words written on the corners of your screen.

Step 2: Uninstall and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

2. In the field type in "appwiz.cpl" and press ENTER.

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.

Step 3: Clean any registries, created by on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.


If any threats have been removed, it is highly recommended to restart your PC.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Get rid of from Mac OS X.

Step 1: Uninstall and remove related files and objects

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

2. Find Activity Monitor and double-click it:

3. In the Activity Monitor look for any suspicious processes, belonging or related to :

Tip: To quit a process completely, choose the “Force Quit” option.

4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to . If you find it, right-click on the app and select “Move to Trash”.

6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to . Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as . If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

Step 2: Scan for and remove files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as , the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.

Click the button below below to download SpyHunter for Mac and scan for :


SpyHunter for Mac

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove from Google Chrome.

Step 1: Start Google Chrome and open the drop menu

Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"

Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.

Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Erase from Mozilla Firefox.

Step 1: Start Mozilla Firefox. Open the menu window

Step 2: Select the "Add-ons" icon from the menu.

Step 3: Select the unwanted extension and click "Remove"

Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Uninstall from Microsoft Edge.

Step 1: Start Edge browser.

Step 2: Open the drop menu by clicking on the icon at the top right corner.

Step 3: From the drop menu select "Extensions".

Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.

Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove from Safari.

Step 1: Start the Safari app.

Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.

Step 3: From the menu, click on "Preferences".

stf-safari preferences

Step 4: After that, select the 'Extensions' Tab.


Step 5: Click once on the extension you want to remove.

Step 6: Click 'Uninstall'.

stf-safari uninstall

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the will be removed.

How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Eliminate from Internet Explorer.

Step 1: Start Internet Explorer.

Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'

Step 3: In the 'Manage Add-ons' window.

Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.

Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.

Remove Push Notifications caused by from Your Browsers.

Turn Off Push Notifications from Google Chrome

To disable any Push Notices from Google Chrome browser, please follow the steps below:

Step 1: Go to Settings in Chrome.


Step 2: In Settings, select “Advanced Settings”:

advanced settings

Step 3: Click “Content Settings”:

Content Settings

Step 4: Open “Notifications”:


Step 5: Click the three dots and choose Block, Edit or Remove options:

Block, Edit or Remove

Remove Push Notifications on Firefox

Step 1: Go to Firefox Options.


Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":


Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”

remove push notifications firefox

Stop Push Notifications on Opera

Step 1: In Opera, press ALT+P to go to Settings


Step 2: In Setting search, type “Content” to go to Content Settings.

content settings

Step 3: Open Notifications:


Step 4: Do the same as you did with Google Chrome (explained below):

three dots

Eliminate Push Notifications on Safari

Step 1: Open Safari Preferences.


Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".

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