Free Up Space On Mac Startup Disk

Free up space on your startup disk and unlock the endless possibilities of your Mac with our full suite of Parallels Toolbox for $19.99 per year. New tools are regularly added during your subscription, too! What is Taking up Space on Mac Startup Disk In order to learn how to fix startup disk full on MacBook Pro, Air, and other models, you need to diagnose the problem first. It is recommended to visit Mac's storage settings and know what kind of data is taking so much space on the startup disk.

If you’re looking for solutions on how to fix ‘startup disk full’ error on your Mac or simply want to clean or optimize your storage space, you’ve come to the right place. Although the newest models of Apple computers are now equipped with relatively large hard drives, some users still find themselves dealing with the startup disk full error. It is because pre-installed programs can already take a significant portion of disk space and over time, different kinds of files will gradually fill the remaining space. Sooner or later, the user might receive this message:

Your disk is almost full. Save space by optimizing storage.

Sure, you can simply ignore it — just click Close and go on with your merry life. However, ignoring it over and over again will not solve the problem. You will eventually get another form of a pop-up that reads:

Your startup disk is almost full. To make more space available on your startup disk, delete some files.

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Aside from this window popping up in the most inopportune moment, such as when you’re backing up your iPhone or saving a document that you have been working on for hours already, the issue can easily escalate. Eventually, you will notice your Mac starting to run slow, which defeats the purpose of owning a fast and reliable Mac in the first place.

For those who don’t know, it’s important to note that you should have at least 15% of free startup disk space for a Mac computer to run properly. So, if you keep on ignoring the friendly reminder to optimize your storage, your Mac will not thank you for it.

What is the Startup Disk?

By default, the startup disk is what’s known as the Macintosh HD. It is the partition in Mac’s hard disk where the Mac OS itself is installed. It is also where most of your files and apps are probably stored. Essentially, the startup disk is where the Mac OS will boot from, so it needs enough space in order to do its job. Once it begins to get filled, it will try to warn you before you experience the eventual slow-down.

The First Step: Knowing What’s Eating Up Your Startup Disk Space

Basically, fixing the startup disk full error requires freeing up disk space. But before you can do that, you first need to know what’s filling up space, so you’d know what you need to get rid of. Thankfully, this can be easily done.

First, open the Apple menu.
Next, go to About This Mac.
Then, choose the Storage If you have an older version of OS X, you may need to click on More Info before you can access the Storage tab.

In this tab, you will see how much of the disk is occupied by certain types of files, which are:

iOS Files
Apps
Documents
Photos
Movies
Audios
Backups
Other

Once you know which ones take up most of the space in your disk, you will know where to start the purge.

How to Free Up Storage Space on a Mac

There are several ways on how to free up space on Mac and ultimately solve the startup disk full error. Luckily for you, almost all of these can be done easily.

Empty the trash.

Make Space On Startup Disk

This may sound elementary, but many of us forget about “taking out the trash” from our computers. When we delete files, they will go to the Trash, which serves as a holding area that you can go to in case you realize you need to recover what you deleted. However, the files in the Trash still occupy space, so you basically just moved the files to another folder. It is recommended to empty the Trash at least once a week. To do this:

Right-click on the Trash in the dock panel.
Select Empty Trash.

You can also open the Trash and click the Empty button found at the top right corner.

Clear cache.

A cache file is a temporary data file created by browsers, apps, and other programs. Even if you remove or stop using an application, the cache files remain in the Cache folder and when not checked, may take up a lot of space — we’re talking about tens of gigabytes here. So, it’s recommended that you clear the cache every once in a while. The Cache folders are inside the Library. You need to look for two types of these folders:

/Library/Caches – This is where temporary files are stored. These files don’t usually take up too much space.
~/Library/Caches – This is where junk files created when you run apps go.

Delete logs.

While in the Library folder, you may also want to check the Log files, another type of temporary files. They can be found in the Logs folder. But before you delete any of them, make sure that you no longer need them.

Remove language resources.

You are probably unaware that your Mac has 26 pre-installed dictionaries, which can be considered the most underrated space eaters. If you don’t need German, Russian, or Dutch translations, for instance, you’d want to consider deleting them along with other localisations. These can be found in the following directory:

Macintosh HD -> Users -> Your User -> Library -> Dictionaries

Delete old iOS backups.

If it has become your habit to sync your other Apple devices with iTunes, it is possible that there are dozens of backups and they tend to take up a lot of space. To delete old backups, go to:

Library -> Application Support -> MobileSync -> Backup folder

Select old, outdated backups, then simply move them to the Trash.

Delete unnecessary documents, photos, and other files.

You need to take a look at your Downloads, Documents, Pictures, Music, and Movies folders and decide which files you no longer need. Next, organize the files that will be left behind. You might also want to consider moving them to an external disk or taking advantage of the iCloud storage.

Uninstall unused applications.

Applications are among the primary space takers, so it’s just logical to remove any that you haven’t used in a while and have no plans of using again. You need to remove them properly, though. Dragging and dropping them in the Trash won’t be enough. You also need to remove the cache and service files, which are found in the Library folder.

Take out the trash again.

Once you have deleted the files and folders mentioned above, they will naturally end up in the Trash, so you will need to empty it again.

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 Mac repair app. 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, and logs, among others. They even take care of emptying the Trash for you. These programs also recommend ways to better optimize your Mac. Tools such as Mac repair app offer a long-term solution to issues known to Mac, helping you maximize its potential as a computing beast.

/Browser Cleanup /Startup Disk Full on Mac? 11 Tips to Free up Space!

As I was using my MacBook Pro today, a message on the screen appeared. It said that the startup disk is almost full. Is there something wrong with my Mac? What can I do to get rid of startup disk full Mac?

There is no need to panic! Just follow our tips on how to clean up your full startup disk on Mac and you should be back on track. I have just the perfect solution for you.

Article GuidePart 1. What is A Startup Disk?Part 2. Why Is My Startup Disk Full?Part 3. How Do I Delete Files on My Mac When the Disk is Full?Part 4. Conclusion

Part 1. What is A Startup Disk?

What is the startup disk on a Mac? A startup disk is actually a partition of a drive which contains a valuable operating system. This means that the hard drive of your Mac does consist of disks. Each of these disks contains the data on your Mac. These data are your operating system, applications, files, and more. Most of Mac’s products actually have just one disk, however, power users have the capability of having two or more.

A Mac that only has one hard disk has the following features:

It has a capacity of the 500GB hard drive.
Since it only has one disk, that means all that 500GB is located on that single disk.
The disk on your Mac as your operating systems like the macOS High Sierra, your user apps, and more.
This hard disk also serves as your startup disk.

However, if you actually have a Mac that has two hard disks, then that means that the storage indicated above will be divided into two. One of them will have your operating system and the other one will serve as your storage for your files. Still, startup disk full is an urgent thing to deal with. Let's learn why is your startup disk full (Mac) and how to free up the space to get a new Mac.

Part 2. Why Is My Startup Disk Full?

At one point or another, a Mac user will see “Your startup disk is almost full” on their screen. While this is a problem that requires prompt action, it isn’t the end of the world. You get this error because your primary disk drive is running out of space, which makes your Mac run slowly. The startup disk is the hard drive where your operating system is stored. That makes it the most essential disk on your Mac. It also contains user data such as apps and files.

Having a startup disk that is close to full poses two problems:

You will soon have no space left for your files.
Your Mac will start to perform slower than usual.

Ideally, 10% should be left free on your startup disk to provide enough space for your Mac to work well. Always remember that a hard disk should not go beyond 85% capacity. If this happens, then your Mac will perform slower and you will have more errors in using your Mac when you go beyond 85%. Startup disk is full how to fix? What to do when startup disk is full? Of course you need to remove files from startup disk.

How to Find What’s Causing Startup Disk Full (Mac)?

Of course, the first thing that you should do is finding out what data is actually eating up storage on your Mac. Here is how you can locate your startup disk.

Go to your Dock and then launch Finder.
Then, go ahead and select Finder in the menu bar located at the top part of your screen.
After that, go ahead and click on “Preferences”.
After that, a pop-up window will then appear on your screen. On that screen, go ahead and mark down “Hard Disk” by clicking on the box beside it.

After that, your Mac will then start to show you its hard disk in an icon form. These are actually the disk/s that you can start up. The reason for this is because they carry your Mac’s operating system. If it happens that you have more than one hard disk, then go ahead and follow these steps:

Hit on the Apple icon located on the upper left side of your screen.
And then, choose “System Preferences” and then click on “Startup Disk”.

After that, you will be able to see your hard disk again and they might carry names like “MainSSD” or “MainHD”. You will also be able to the operating system that is running on your Mac. If it happens that you have more than one hard disk, then your startup disk is the one that is carrying the latest version of macOS.

See What is Taking up All of My Startup Disk Space?

Now, here is how you will be able to see what are the things that are actually taking up space and make your startup disk full (Mac):

Press the Apple icon in the top-left corner of the screen.
Click About This Mac and press Storage.
This will give you an overview of the usage of the disk space. You will see how much space you have left and which files are taking up space.
Take note of which files are occupying the most space and you can start from there.

Part 3. How Do I Delete Files on My Mac When the Disk is Full?

Tip 1. Clear Disk Space on Mac Quickly

How to clear disk space on Mac? Cleaning up your Mac’s full startup disk is easier and quicker if you’re using the right tool. An excellent example is iMyMac PowerMyMac, it helps you check and free up more disk space on the startup drive. It removes the unnecessary files that take up your disk space, including system junks, duplicate photos, mail attachments, iTunes old backups, browsers caches, apps, ect. Just with a few clicks, you will have more disk space released and can really fix startup disk full (Mac) issue.

So how to clear my startup disk? Well, you’ll find out just how much junk files you have once you download and use the software to free up space on Mac:

Download the software and launch it.
From the left side of the screen, select Mater Scan.
Click the Scan button to begin looking for the available junk files on your Mac.
Once the scan is complete, the software will show you the User Logs, Application Cache, System Logs, System Cache, and their respective file sizes. Select a category you want or just select All.
When you have selected everything that you want to get rid of, press Clean.

Now you know how to free up disk space on a mac with iMyMac. In order to free more space on Mac startup disk, just go back to the left-hand side of the screen and repeat steps 1 to 3. In this case, you have to select Large & Old Files, Duplicate Finder, Uninstaller or other functions to remove other unnecessary files in your disk.

Tip 2. Delete Old iTunes Backups

Did you know that every time you decide to update iTunes, it creates a backup of your iTunes library? This just gives you a whole lot of backups that you don’t even need. That’s why this is a good place to start to clear up your startup disk and fix startup disk full (Mac). After all, you’ll only need one backup. Here’s how to look for your backups and get rid of them:

Launch Finder and click Go in the top-left corner of the window.
Choose Go to Folder.
Enter “~/Music/iTunes/Previous iTunes Libraries” in the field.
Delete the old backups.

Tip 3. Delete Old iOS Backups

If you have an iPhone or iPad and you update them using iTunes, you likely have a ton of backups in your Mac. Follow the steps below to get rid of them:

Open Finder > Go > Go to Folder.
In the field, enter “~/Library/Application Support/MobileSync/Backup/”
Delete the old backups.

Tip 4. Remove Old iOS Updates

Aside from creating backups of your iDevice’s files, iTunes also downloads updates for your device’s apps. Once your apps are updated, the updates no longer serve any purpose. They simply stay on your Mac and waste space. Here’s how to look for them and remove them:

Run Finder > Go > Go to Folder.
If you have an iPad, enter “~/Library/iTunes/iPad Software Updates”.
If you have an iPhone, type in “~/Library/iTunes/iPhone Software Updates”.
Delete the files that you see.

Tip 5. Get Rid of Cache Files

Cache files help your Mac run applications faster. However, they accumulate over time as programs generate temporary files. They remain on your Mac and eat up disk space if you don’t delete them yourself. When you get rid of cache files, the priority must be with removing the largest files so that startup disk full (Mac) issue will be solved.

Do not delete everything. Moreover, we recommend deleting the files inside the folder instead of deleting the entire folder:

Open Finder > Go > Go to Folder.
Enter “~/Library/Caches” and delete files
Press Go to Folder again and type in “/Library/Caches”. Drag the large files to Trash.

Tip 6. Remove Language Packs

Your apps may come with language packs that allow you to change the language in the app. It’s a great option, but let’s admit it. We only use our app in one language. We can get away without the rest. Here’s how to clean them up:

Launch Finder and head to Applications.
Ctrl + Click on an app > Show Package Contents.
Select Contents > Resources.

Look for files ending in .lproj. These are the language packs. Select those that you are not going to use and delete them. Repeat the steps for other apps.

Tip 7. Uninstall Unnecessary Apps

Many users have numerous apps that they have never launched. In such case, there is no better way to free up your full startup disk than to remove old and unused apps.

We suggest using iMyMac PowerMyMac's Uninstaller for fixing startup disk full (Mac) purpose. Dragging an app straight to Trash can leave behind hidden files such as app logs. However, this tool successfully uninstalls the app and deletes associated files along with it.

Tip 8. Remove Browser Cache

Every time you visit a new page on your internet browser, it generates cache to make it load faster on your future visits. Doing this on every page, though, will lead to a growing browser junk. How you remove browser cache that may differ for different browsers? Visit the support page of the developer for more details.

Tip 9. Delete Duplicate and Unused Files

Start Up Disk Space

Your Downloads folder is a goldmine of unnecessary files. There is also a big chance that you don’t even remember downloading a couple of them. Get rid of everything you don’t need, and try to organize your files. You’ll thank yourself for that in the future. Check out your folders for photos, music, and videos as well. This will be a good way to fix startup disk full (Mac).

Tip 10. Compress Files

There are files that we don’t use that often but we need to keep. The best option for these is to compress and turn them into smaller files. It’s just easy to do that. Ctrl + Click the file that you want to compress and hit Compress. This is recommended for huge files like movies and videos.

Tip 11. Take out The Trash

How To Free Up Space On Mac Startup Disk

After deleting all those junk, they are just sitting in the Trash. Now it’s time to get rid of them – for good. Click on the Empty button, and this should free up considerable space in your startup disk.

Part 4. Conclusion

Now that we have already discussed everything about your startup disk full (Mac), then it is time for you to remove items from startup disk and to prevent it from getting full. Remember that a full startup disk will cause your Mac to get slow. You should regularly clean up your Mac to ensure that it is performing optimally and you have sufficient space for your files. Don’t worry, iMyMac PowerMyMac will make it a breeze!

This tool is one of the things that you should have for you to be able to keep your Mac safe, clean and of course, healthy. Just have a free trial below.

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How To Free Up Space On Mac Startup Disk

Thanks a lot. Usually, I would just empty the Trash, but apparently there's more around. Now I have ideas to clear up some more space.

iMyMac2019-03-20 09:05:24

Thanks for your support!

Pachers2018-10-22 14:05:24

I'm new to Apple and have no idea to my Mac startup disk full problem. Thanks for your tips, I have cleared almost 100gb space and now I can download my favorite movies again!

iMyMac2018-10-22 17:13:07

Macbook Startup Disk Full

Thanks for your support!

How To Free Up Space On Your Startup Disk Mac

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