Mac Start-Up Disc Is Full: Learn These 14 Ways To Clean It

Mac Start-Up Disc Is Full

You are struggling with space and the message pop up that informs you regularly that Start-Up Disc full. Well, let’s find out effective ways to clean your Start-Up Disc. This article will get you the proper solution to the problem you are facing.

Before that let’s gather the basic information about your startup disc is full.

You Get An Alert

When your start-up disc is almost full you get the warning alert that indicates that there is no longer enough free space on your disk. This often happens when many files occupy your Mac’s hard drive, bringing free space to a dangerously low level.

Impact on your Mac.

  • The scarcity of free space on a startup disk leads to both unstable and slow performance of the macOS system.
  • Launch or working properly becomes difficult, in fact, it can suddenly crash or solely cease to work.

Measures to be taken startup disk is full-on Mac

  • Free up some disk space and this will also avoid the message popping. 
  • You can free the disc space by:
  • You can either remove some files manually or 
  • Practice a special app to find non-beneficial files and clean up startup disk in moments.
  • You can also upload some lengthy files to the cloud or you can also use backup disk, and remove those files from the startup disk, despite, this procedure necessitates you to have additional storage.

Data Storage Categories:

Mac Start-Up Disc Is Full

Majorly data is consumed by the following mentioned below, which occupies most of the space and the major reason for your startup disc full.

  • Images,
  • Applications
  • Movies,
  • Audios
  • Backups,
  •  Documents and Other items.

Now, you know what files take up space on your Mac startup disk. Usually, Movies, Pictures, or Backups take up the most space. Other biggest space consumers like “Other” files, including caches, logs, cookies, archives, disk images, plugins, extensions and so on also highly space consuming and cannot be neglected. You can remove non-beneficial files manually or use special software tools for quick and easy disk cleanup.

Space needs to be free

To make your 10 to 30 Gigabytes by removing unneeded files. You can take the help of the MacCleaner Pro bundle to both analyze disk space usage and free up disk space. This is one of the most agile solutions to clean the system disk and prevent the “Startup Disk Full” message.

MacCleaner Pro helps you to to identify the following:

  •  Largest files and removing junk files, 
  • Unneeded downloads,
  •  Duplicate files and folders, 
  • Unused applications.

Let’s check the startup disk on your Mac?

These steps will support you to notice which kind of files consuming your startup disk space.

  1. Click About This Mac menu at the Apple menu
  2. Click the Storage tab
  3. Review the storage usage to see what files are eating up space.

Mentioned below are the most effective ways to clean your full start-up disc.

Let’s begin Cleaning up Mac Startup Disk

Eliminate The Trash 

Yes, it is true you frequently delete files and forget to empty the Trash. The junk available in Trash definetly occupies your disk space, so it is suggested that you empty the Trash folder at least once or twice a week.

Follow these two ways to delete files from the Trash folder permanently:

  •  Do a right-click on the Trash in the dock panel <select Empty Bin and your trash is clean. 
  • Another way to complete this task is to open the Trash < click the Empty button in the top right corner.

Clear Cache Memory

Cache files are basically temporary data stored on your hard drive and used to speed up processes. There are many application which might not be used anymore, the leftovers in the Cache folder may occupy much space of your disk memory. 

It is also necessary to clear cache memory from time to time.

Cache files are stored in the Library folders, which you can find in the following locations:

  • /Library/Caches
  • ~/Library/Caches

In /Library/Caches you will find temporary files created by the system. Usually, these files don’t occupy too much space. However, in the ~/Library/Caches folder, you can find several junk files, which are created while running the application. Essentially, this folder may increase substantially in size. However, Cache files with an apple in the name cannot be deleted. Deleting such files may cause a system crash.

By default, the Library folder is hidden on macOS, like Apple. To open it, follow these steps:

  • Go to the Finder window.
  • From Menu click Go → Go to Folder.
  • Type ~/Library/Caches in the dialog box and click Go.
  • Keep all the folders, but go into each one and delete the files inside.

Eliminate Downloads

  • There are several times that you need to download files from web browsers, messengers, torrents, mail. 
  • By downloading files from the Internet, by default, they get saved in the Downloads folder and that occupies space.
  • You can find downloads at this location: /Macintosh HD/Users/Current User/Downloads
  • All of the files in the Downloads folder usually stay unorganized and may take up several Gigabytes of free space.

Downloaded files from the Internet are stored in the current user’s download folder. It generally happens that you download the file to use only once or twice, such as any pdf, document, information or image. Over time, this folder can become extremely large with files you grabbed on various Internet sites. Cleaning up this folder can return some much-needed space to your hard disk.

Eliminate Logs

While the Library folder is open, you can also find another type of temporary file – Log files. Most of this logging information is only relevant to debugging and developer usage and has little practical usage to the average Mac user. They are stored in the Logs folder. Please make sure, before you remove the logs of the system, apps and mobile devices, that you no longer require them.

How to clear the log:

  • From the Mac Finder, pull down the “Go” menu and choose “Go To Folder”
  • Enter the following directory path exactly, including the tilde: ~/Library/Logs
  • Selectively choose the logs you want to inspect or delete, or alternatively, you can select and trash them all
  • Empty the Trash as usual

Erase Language Resources

Language Resources – are localizations of software, that is, all interface languages available in a program. Some programs have a huge number of possible interface languages that worth respect. But usually, users need only one version of the interface or just a few, but obviously not 20. Individually localizations take up not much space, around 1-2 Mb, but all together they may consume a lot. Apart from English, lots of apps include languages such as German, Chinese, French, Portuguese, Italian, Korean, Russian, Hindi, and others.

Follow the steps below to remove unneeded language files:

  • Open the Applications folder → select Spotify → right-click and select Show Package Contents.
  • In the window that appears, select Resources and delete the useless language files. Generally, these files have the first two letters of a particular language and an .lproj extension.

Using this method, you can remove all unused languages in your applications. Be careful to only delete certain language files, since deleting important application files can affect the app’s performance or even lead to a crash. Given steps can be easily done by the ClearDisk application. Press the Scan button, and the ClearDisk app will do all the work instead of you. It will find all junk files in just a few seconds: Downloads, Trash, Cache, Logs, Language Resources.

Shed Remains and Infrequently Used Files to External Drive 

  • There are many broken service files left after deleting the apps which are known ad remains. Such broken service files are worthless and they just take up your disk memory, so you should find and remove them.
  • You will find the apps’ leftovers stored in the Library folder; though, they can be scattered in different locations all over your drive, littering your Mac. Searching for them manually seems to be an impracticable task. 

Pass Large Seldom Practised Files to External Drive: Willing to free up gigabytes of data, the best way to do it as promptly as possible is to check out your Movies folder. Video content is the biggest space-eater as well as audio and photo files in the Music and Pictures folders.

  • Check also your disk for other files with large sizes. For this, go to File in the Menu Bar and select New Smart Folder.
  • In the top right corner click the Plus button and, in the parameter fields, select File Size … is greater than, and set the needed file size, for example, 1GB or 500MB. Preview the biggest files and remove/move unused ones.
  • Though you might have removed the big files, like videos or music, you may have lots of other huge files you don’t suspect. Analyze your disk space usage deeper and find out what’s taking up the most space on your disk.

Delete Old iPhone Backups

While syncing your iPhone with iTunes, the application creates dozens of backup copies on your device, and also consume a significant amount of gigabytes of disk space, as it includes movies, music, and other large files. 

There are two ways to find and remove backups:

  • To find old backups, Open iTunes → Go to Menu Bar → iTunes → Preferences. You will find all the backups iTunes managed to make while working with your gadget. Before deleting But make sure they are in iCloud!
  • Another option to find and remove iOS backups is to go to the following location: ~/Library/Application Support/MobileSync/Backup

Delete Mail Downloads

There are many mails several months of working with the mail client, which has been bundled and consumes several GB.

  • You can find this folder is by searching via Spotlight. Just type “Mail Downloads” in the search field.
  • If this method didn’t work, then open the Finder → press Shift+Cmd+G key shortcut and in a search field enter: ~/Library/Containers/

Preview the files and save those which you need, or delete all the files at once.

Uninstall Unused Apps

  • There are many apps which are not utilized by you. There might be apps that were required only once but yet kept in your memory and consuming a lot of space.
  • These apps take up a lot of space on your Mac’s hard drive. So it’s time to uninstall such unused programs. But please note, moving an app to Trash just by dragging and dropping it to Trash is not enough.
  • Remove the app’s cache and other service files, which are stored in the Library folder.  
  • Rather than going on a search manually you can use various App Cleaner & Uninstaller that can automatically find all the service files of the apps and even the leftovers of already removed apps.

Use Cloud-Based Data Storage Services

  • You might have used the Google Drive service, which means you know that even in a free version, the service provides 2 gigabytes of space. Moving big files and folders from your hard drive to the cloud storage can be done. 
  • You need to use the judicious synchronization option, which permits you to delete content sent to the cloud from the hard drive. 
  • To do the following- Launch Preferences → Sync section and specify the desired folders to sync.
  • Except for Dropbox, there are dozens of other similar services you can use, such as Dropbox, iDrive, Microsoft SkyDrive and many more.

Do Not Keep Unnecessary Duplicate Files

Duplicate files take up useless disk space on your Mac. Hunting for duplicates with so much time consuming seems to be a lengthy and arduous process. Therefore, you can quickly find out the duplicate media files (music and video) in the iTunes Library.

To find duplicate music and video files, follow these steps:

  • Open iTunes.
  • Click the File in the Menu.
  • Select Library → Show Duplicate Items.

iTunes will show you a list of duplicates. Examine the list and remove the duplicates.

Now the hard work starts for all other types of duplicate files, you need to look through each folder separately. This could take hours. But don’t panic; there is a solution. You can search for duplicate finder applications that can find out duplicate images, videos, apps and much more for you. You will surely find this useful.

Delete Unnecessary Screensavers And Images

If you are a Mac user you love to explore the diversity of screen savers and images and have a big collection of them, don’t forget that they may eat up a sizeable memory on your disk. But you can eliminate the unrequired screen savers and desktop pictures which are no more in your favorites.

To find the desktop wallpapers, go to the following directory:

  • /Macintosh HD/Library/Desktop Pictures
  • It contains 52 images of 432.52 Mb. You are free to delete all redundant pictures.

Back To Basics Restart Your Mac

The most basic yet effective, once you’ve cleaned up your hard drive, you should restart your Mac. A simply rebooting of the system can help to free up the disk space cluttered by temporary items and cache folders. This will help you to clean the virtual memory and sleep image files.

Clear Ram Memory on Your Mac

You must not forget about your RAM as well. This will not help in just creating more space on your Mac but will speed it up. This is especially important when your startup disk is almost full and your Mac’s speed is starting to lag. You can choose to download RAM cleaner which can be very beneficial.


Great!! now you know it all by utilizing these tips you can delete approximately 20 GB of data which can be kept free. This article provides you with the most effective way to clear your startup disc. Mentioned above suggestions definitely help you to do the proceeding manually as well as with the professional tools. Comment below and let us know does this article help you to clear your startup disc?

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