Your Startup Disk is Almost Full – How to fix ?

Mac is preferred over Windows for its user interface, security features and most importantly for its swift operations. But the day when Mac user gets the message Your startup disk is almost full it hits very hard. Why, because soon your Mac’s performance will degrade, and you won’t have enough space to perform basic operations.

Your Startup Disk is Almost Full on Mac OS

Well, down the line Mac is also a gadget, that needs to be optimized from time to time. When users forget this junk, redundant data takes up most space on Mac and sooner or later “startup disk is almost full” message appears.

Also Read: Increase your System Performance with Best PC Cleaning Tools

What is startup disk and What Does it Mean When Your StartUp Disk is Full on Mac?

Startup disk is the drive partition where your Mac files are stored, this makes it the most important part of the disk. So, when you get the message Your startup disk is almost full on mac it means there are too many files stored and free disk space is insufficient. This will not only slow your Mac’s performance but will lead to system crashes as macOS is not getting enough free space to store temporary files.

In this case the first thing you need to do is to analyse disk usage and ways to free space on Mac. But if this Mac startup disk almost full message appears when you are working on something important and you don’t have time to fix it then?

We understand some people are short of time and they are looking for a one click fix to resolve your startup disk is almost full message.

For this, we recommend you use Cleanup My System. Read the full review here.

It is an incredible system optimization suite that offers advanced features. When it comes to cleaning your startup disk and making your Mac run faster Cleanup My System works wonder. This tool scans your entire Mac for gigabytes of junk files – that you don’t know about or recognize.

Download it now to save yourself from all hassle of manual cleaning and fixing startup disc full on Mac.


Using its One-Click Cleaning feature – One-Click Care, you can clean system and user-generated cache files, system and user log files, redundant parts of applications, old and large files, mail attachments. Cleanup My System is a long-term solution that will help to keep your Mac optimized and clean.

Features of Cleanup My System:

  • One-Click Care: This feature of Cleanup My System makes the process of performing multiple cleaning easy and saves time. Further, it helps to deal with fixing startup disk full errors on Mac.
  • Startup Manager: Helps to manage the Login Items & LaunchAgents and improve the boot time of Mac.
  • Logs Cleaner: Deletes all unnecessary user log files from your Mac to recover disk space on Mac.
  • App Optimizer: Remove redundant apps by the use of the Uninstall Manager module.
  • Old & Large Files: Unused large media files and old files which are redundant can occupy a valuable amount of storage space. Cleanup My System scans your system for these unused files and cleans the startup disk on Mac.
  • Disk Analyzer: Gives you a detailed storage visualization of your storage disk on Mac.

Manual Cleaning

  • Identity: Secure your Mac by cleaning cache and cookies stored on your web browser by further reducing the chances of getting exposed.
  • Privacy: It saves you from the autofill data, passwords, last session’s tabs to safeguard user’s internet activities.

So these were the few notable features that this amazing app that will help to clean startup disk on Mac. Too good to be true, right? Well, see it yourself!

Download now if you never want to see that annoying message “Your Startup Disk is Almost full” again, ever!

Manual Methods Fix Mac Startup disk almost full Issue

If you are DIY types try these ways to deal with startup disk almost full message on Mac

1. Empty Trash

It may sound very simple, but most of us forget to empty the Trash and the files in Trash keep on taking up storage space. Hence, it is recommended to empty the Trash folder at least once a week.

To shred files permanently right click on the Trash in the dock panel and choose Empty Trash.

Alternatively, you can open the Trash and click the Empty button present in the top right corner. This simple step will help you recover space on Mac in no time.

2. Clear Mac Cache

Where cache files decrease page load time, they also occupy unnecessary storage space resulting in startup disk almost full-on Mac error messages. Therefore, we need to clear the Mac cache to free up space and make the Mac run smoothly.

To remove Mac cache, follow steps below:

Open the Finder window and select Go.

Now click on Go to Folder
Here type ~/Library/Caches

Select the files and folder taking most space to recover space.

After this, again click on Go to Folder > type /Library/Caches without ~. Here again, select the files and folders taking storage space and delete them.

This will help you delete unnecessary Cache files taking up storage space. Once they are deleted, your Mac will start to work smoothly. However, if you are afraid of cleaning these files manually you can use a utility. Yes, you guessed Cleanup My System will clean up system cache in no time.  Just a suggestion.

Once you are done performing steps explained below don’t forget to restart your Mac. This will help to create new Cache files.

3. Delete old iTunes Backup

The recent version of iTunes creates a backup of your iTunes Library when the application is updated. These backups can be deleted easily to free up space and get rid of storage space full-on Mac message. To trash old iTunes backup, follow the steps below:

Open Finder Window > click Go > select Go to Folder.
Here type in ~/Music/iTunes/Previous iTunes Libraries.

You will now be able to see all old iTunes backup select the ones that are too old or you think you don’t them anymore.

4. Get rid of old iOS Backups

Backups are important they help to get our files back in case of virus attack or any unforeseen situation. But if we don’t organize them they tend to take a lot of space that leads to your startup disk is almost full

To delete old iOS backups follow the steps below:

Open Finder Window > click Go > select Go to Folder.
To delete iPad backups type in ~/Library/iTunes/iPad Software Updates

for iPhone type in ~/Library/iTunes/iPhone Software Updates.

These simple steps will help to recover space and clean Startup Disk on Mac.

5. Delete Downloads

We all download multiple files from web browsers, torrents, mails etc. in a day. These files by default are saved in the Downloads folder. To know about these files and delete unnecessary files taking space head to /Macintosh HD/Users/Current User/Downloads location.

These downloaded files take unnecessary space hence we should sort them and delete unnecessary files from time to time to Clean Startup Disk on Mac.

6. Remove Remains

Remains as the name says are leftover files once an app is deleted. Such files take unnecessary space and result in mac startup disk full. To solve this issue, you should remove remains.

Apps leftovers are stored in the Library folder, but sometimes they are distributed in different locations occupying storage on Mac.

Run Disk Utility:

You might not be aware, but your Mac contains an inbuilt cleaning app, called Disk Utility. Disk Utility removes all cache and junk files. To run this simple app, you should follow the steps below:·

Go to the applications and utilities

Search for Disk Utility and open it.

The window now will ask you to select a disk, volume or image.

Select the disk by clicking on the disk, which is on the left.

Now click on the ‘First Aid’ option from this window and click ‘Repair Disk Permission’.

Disk repair will run automatically. To see what all Disk Utility is removing from your system, you can select ‘show details’ option and vice versa. This will help you resolve mac startup disk full issue.

Remove Unnecessary Applications:

There must be many unused applications on your Mac. You should remove these applications to free up some memory and to handle Mac startup disk almost full.

User Alert: Be careful before performing this function and don’t just throw away any application in order to free up some space.

So, these were some simple manual methods that will help you deal with your startup disk is almost full message. If this all seems time-consuming and complex give Cleanup My Mac a try.


  • comment_avtar
    Goldie Delcamp
    I am forever thought about this, regards for putting up.

    3 years ago

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