• How Do You Free Up Space On Your Hard Drive Mac
• How To Free Up Space On Your Hard Drive Mac Setup
• How To Free Up Space On Your Hard Drive Macbook

Mar 16, 2021 Ways to free up disk space on a Mac. Before we show you how to clear disk space on your Mac, a word of caution is in order. Hard drive cleaning requires time and, in some cases, expertise. So, when in doubt, use a professional cleaning app. Now, let’s make some room for the files that truly deserve space on your Mac. However, there is one problem that is free up mac hard drive space quite common, and it is noticeable among people who already have some experience with MacBook’s. Hard drives do not offer the most amount of space, and those who would like to keep more files on a Mac struggle. The bigger the files you can delete, the more space you can free up—so let's go hunting. Click the Apple menu in the top-left corner of the menu bar and choose About This Mac. If that overview.

How Do You Free Up Space On Your Hard Drive Mac

Freeing space on your Mac OS X startup disk

This extract from a chapter of our book Troubleshooting Mac® OS X describes several ways to free-up space on your Mac OS X startup disk, also known as your Mac OS X boot volume.

While you could replace your current hard drive with a larger model, or install a second internal hard drive if your Mac will support such, the following tips will help you to free some space without changing your hardware. Additional tips are provided for saving more space if you have a second internal hard drive or an available partition.

Determining available space on your startup disk

To check how much free space is available on your startup disk:

1. In Finder®, select your startup disk's icon. For most users, this is Macintosh HD.
2. Press the Command-I keyboard combination.
3. The Get Info window for your startup disk will open. In the General pane, the Capacity, Available (free space), and space Used on your startup disk will be displayed, as seen in the following screen shot:

Simple ways to free space

You can employ any of the following tips to increase the free space available on your Mac OS X startup disk without altering your hardware.

Empty the Trash

As obvious as it may sound, some folks regularly Trash files but neglect to periodically empty the Trash. In Finder, select Finder > Empty Trash or, under Mac OS X 10.3 or later, you can also select Finder > Secure Empty Trash.

Do not use the Trash as a temporary storage area: only put an object in the Trash if you are sure it is no longer needed.

Some applications, such as iPhoto® and Mail, have their own Trash, spearate from the Trash seen in the Dock. Emptying the application’s Trash may delete its contents immediately or move its contents to your personal Trash, which you can then empty as noted above.

Archive old files

Archive — move, copy and delete, or backup and remove — files you do not use regularly to CD or another backup medium.

If you have not done so already, this is an excellent time to consider implementing a comprehensive backup and recovery solution.

Mac OS X 10.3 Panther® and later include a built-in function for creating compressed archives of files or folders. These archives are generally far smaller than the original files they contain, provided the original is not already in a compressed format. To use this function, see the following AppleCare® Knowledge Base document corresponding to the version of Mac OS X you are using:

Clean up system logs and temporary files

Follow the advice in our 'Running Mac OS X Maintenance Scripts' FAQ to regularly execute the Mac OS X maintenance routines that clean up System logs and temporary files created as part of the UNIX® underpinnings of Mac OS X.

Remove unused localization files

If you selected the Easy Install option when installing Mac OS X, localization files for over a dozen languages are installed. These files enable the Mac OS X interface to appear in a variety of languages. You can save roughly 200MB of disk space by removing unneeded localization files using the freeware utility Monolingual.

Delete the Previous Systems folder from a prior Archive and Install

If you have performed an Archive and Install of Mac OS X, a Previous Systems folder was created containing your prior Mac OS X System folder. Once you are satisfied that your Mac is functioning properly after an Archive and Install, you can delete the Previous Systems folder as follows:

• Mac OS X 10.3 Panther® or later:

1. Using your Admin account, drag the Previous Systems folder to the Trash.
2. Type your Admin password when requested to authenticate this operation.
3. Empty the Trash.

• Mac OS X 10.2 Jaguar: See the AppleCare Knowledge Base document 'Mac OS X 10.2: How to Delete a Previous Systems Folder.'

Uninstall unused applications

If your Macintosh HD > Applications folder is cluttered with applications you are no longer using or trial software that shipped with your Mac that you do not intend to use, then uninstall them.

Delete old iTunes Library file backups

Recent versions of iTunes® create a backup of your current iTunes Library file whenever the iTunes application is updated. After you are satisfied that an iTunes update is performing nominally, trash old iTunes Library files with your Home > Music > Previous iTunes Library folder, then empty the Trash.

Remove old iOS device backups

Apple iOS® devices (iPad®, iPhone®, iPod touch®) automatically back up specific files and settings to your Mac whenever they are connected to your computer. The backups are saved in your Home > Library > Application Support > MobileSync > Backup folder. While you should retain your most recent backups from these devices, older backups can be deleted in the Devices pane of iTunes preferences. For details, see the following AppleCare Knowledge Base documents:

Trashed iDVD or GarageBand? Don't forget the loops and themes…

If you plan to uninstall iDVD® or GarageBand® by moving these applications' icons from the Macintosh HD > Applications folder to the Trash, be sure to also trash the corresponding iDVD or GarageBand folders within the Macintosh HD > Library > Application Support folder. These folders contain iDVD themes and GarageBand loops and instruments, respectively, that consume several gigabytes of disk space.

Uninstall Mac OS 9

If your PowerPC™-based Mac can only start up into Mac OS X and you have no need for Classic mode, you can uninstall Mac OS 9 to save additional space.

More ways to save space if you have a spare partition or second hard drive

If you have an available partition or a second hard drive, you can also save space on your Mac OS X startup disk with the following additional tips.

Move your iTunes Music folder to another disk or partition

To change the location of your iTunes Music folder, carefully follow the instructions in the AppleCare® Knowledge Base document 'iTunes for Mac: Moving your iTunes Music folder.' Additional information can be found in iTunes Help.

Laptop users may want to consider having two iTunes libraries: a small library of current favorites on their computer, while their complete library resides on an external hard drive. Utilities like iTunes Library Manager enable you to easily have multiple iTunes libraries you can use with your account.

You can investigate other solutions for managing multiple iTunes libraries by searching MacUpdate and VersionTracker.

Move your iPhoto Library folder to another disk or partition

To move the iPhoto Library folder to a new location, employ the instructions in the AppleCare Knowledge Base document from this list corresponding to the version of iPhoto you are using. Additional information can be found in iPhoto Help.

Laptop users may want to consider having two iPhoto libraries: a small library of current, favorite photographs on their computer, while their complete library, or archives of older photos are saved on an external hard drive. Utilities such as iPhoto Buddy and iPhoto Library Manager enable you to have multiple iPhoto libraries that you can use with your account.

You can investigate other solutions for managing multiple iPhoto libraries by searching MacUpdate and VersionTracker.

What about moving my Home or Users folder?

The UNIX underpinnings of Mac OS X make it possible to move either your Home folder or the entire Users folder to a different disk or partition. While this seemed to work well for some users in the early days of Mac OS X, it has become problematic with respect to Mac OS X Updates.

For example, we know of at least one Mac OS X Security Update that expected the Users folder on the Mac OS X startup disk. Those who had relocated Users to another partition had problems installing this update. Consequently, we do not recommend moving either your Home or Users folders to a different disk or partition.

Finding lost disk space

If you find your Mac OS X startup disk has become full unexpectedly:

1. Check Console for clues. In particular, examine the various Console logs for large blocks of identical, repeating messages. Such blocks of repeating messages often indicate a runway process is logging excessively due to either a flaw in the process itself, its logging parameters, or a problem with your Mac. Excessive logging can result in log files growing without bounds.
2. The utilities OmniDiskSweeper and WhatSize are great for finding large, invisible files. Be sure you understand the purpose of a large file before deleting it. In particular, Virtual Memory (VM) Swap files, located in the /private/var/vm directory, should not be deleted while your Mac is running. VM Swap files are created and released dynamically by Mac OS X.

If you regularly work in programs like Adobe Premiere Pro, Final Cut Pro, and Adobe Photoshop, you’ve probably encountered errors relating to a 'scratch disk.' The most common error is Photoshop’s refusal to open, along with the message 'Could not initialize Photoshop because the scratch disks are full.'

If you’ve stumbled on this page because you’ve experienced this issue, you’re in luck: we’re going to show you how to resolve your scratch disk problem easily and, as a bonus, keep your computer clean and performing at its best.

What is a scratch disk?

Before we highlight some solutions, it would be a good idea to have at least a general sense of what a scratch disk actually is. When you are using programs like Photoshop or Final Cut Pro, they require a working space called virtual memory or cache memory. This is where temporary project files are stored and accessed.

For this guide, we are focusing our laser sights on Photoshop. After all, it is the most common application. But rest assured that the info we cover will apply to most programs that rely on scratch drives.

Scratch disk is your hard drive space used by Photoshop as virtual memory when there is not enough RAM to complete a task. Photoshop allows you to assign several scratch disks: that way, it has more space at its disposal.

When working with large images and lots of layers, Photoshop is secretly chewing up your drive space by rapidly creating a mountain of project temp files.

It’s important to note that when you set up Photoshop, you will have the option to assign the scratch disks to the drive of your choice. We highly recommend not using your system drive unless you have no other alternatives.

Reasons behind “scratch disks are full” error

Temporary files are the most significant reason behind the “scratch disks are full” error. They usually mass up in your drive without leaving single evidence of their presence. If you have a habit of force-quitting Photoshop, you may have a lot of temporary files stored in your system. As Photoshop can’t fully close all projects after you quitted it so rapidly, it keeps such files on your machine.

Here are some other reasons that may cause the mentioned message:

• Lack of space in the drive where the scratch disk is located
• The partition of the disk being used by Photoshop is full
• Limited RAM allowed for the Photoshop

What to do when your scratch disks are full?

Next, we’ll explain how to clear out the scratch disk and fix the Photoshop issue on a Mac. If you’ve faced a problem on the Windows computer, follow the instructions below.

How to fix “scratch disks are full” error on Mac

Mac users receive a 'scratch disk full' message when Photoshop (or any of the other programs) has used up all the space on the hard drive that has been assigned as a scratch disk. This used-up space is temporary and separate from your actual project file.

The problem is that Photoshop doesn't always get rid of these temporary files when they aren't needed anymore, which is more like a permanent problem if the user can't find a solution.

So how to clear your scratch disks? Let's find out.

Important takeout: If your HD is full, Photoshop will display scratch disk errors.

1. Clear your Photoshop cache

Photoshop has an in-built solution for deleting specific Photoshop caches. When these pesky caches aren’t removed automatically by the program, they can grow and take up a lot of space on your scratch disk.

To use this tool, simply enter Photoshop in Mac and with an image open:

• Click the Edit menu button.
• Hover your mouse over 'purge' to reveal 4 different options.
• Undo, Clipboard, Histories, All. If an item is greyed out, that means it has already been deleted.
• Select the specific item you want to delete or select 'all' to delete all of your caches.
• You will be warned that the purge cannot be undone, so make sure you don’t need a previous version of one of your projects and then click OK.

A good way to keep Photoshop cache from piling up is by running regular disk cleanups. But here is a problem: the cache sits so deep in system folders (and their subfolders) that deleting it manually becomes a pain. A company called MacPaw produced a tool just for this purpose, CleanMyMac X. You've heard of similar tools, but that one actually pioneered Mac cleanup.

Here’s how you can schedule regular cleanings with CleanMyMac X:

1. Launch CleanMyMac X tool.
2. Click System Junk and press Scan.
3. Click Review Details to deselect the data you want to keep.
4. Hit Clean to clean up junk files.

Just let it do its thing. That way, you’ll never forget to clear Photoshop cache and tons of other system junk on your system.

You can download CleanMyMac X free version and see how it works.

How your Scratch drive is filling up, an example from Sketch

Along with Photoshop, Sketch is another app that keeps temporary versions of projects on your disk. And it eats up a whole lot: from 60 to 220 GB on average.

Each time you press Command + S, some space is wasted away from your Scratch drive. Say your file weighs 23 MB. Then, 7 temporary editions would increase that size to 161 MB. This problem hasn’t been widely known until recently, but, luckily, there is an automatic solution.

How To Free Up Space On Your Hard Drive Mac Setup

CleanMyMac’s System Junk module lists Documents’ Versions from Sketch and other similar apps. You can keep the final and the oldest version of a project and delete all revisions in-between. Voila, you’ve got free space again!

2. Delete your temp files

When it comes to wasting space on your scratch disk, the worst culprit is often Photoshop's own temp files. If Photoshop isn't going to get rid of them, I guess you’re going to have to do the job yourself.

To find them, you'll need to look for files that begin with 'pst' and then a string of numbers followed by the file extension '.tmp.' Search 'Photoshop Temp' with a space between the two words.

You can just search your scratch drive, but to make sure everything is found, rather perform the search on the entire computer. It may take a couple of minutes for the search to complete, so pop into the kitchen for a quick snack while you wait.

When you return, you should have a long list of files. If your work is saved and the program is closed, you can safely delete these files and watch as your scratch disk space is reclaimed.

3. Clear your disk space

If you don't have another drive or don't want to buy one, then it's time to do some spring cleaning. Look at the drive contents to see if you can delete anything you don't need. Is there storage space that can be cleared? Usually, there is, so go ahead and delete your old files and free up some space.

Alternatively, you can simply transfer files to external drives, DVDs, or cloud storage solutions like Dropbox and iCloud.

Take a look at our How to Clean Your Startup Disk (10 Ways). Inside we have lots of practical advice for macOS users who want a clean drive that performs well. Even if your scratch disk isn’t your startup drive, and we hope that is the case, there are many tips to help you spring clean like a pro.

Notice for macOS Sierra (and higher) users:Users of macOS Sierra might be aware that Apple has added new tools to 'help' manage storage space. If you navigate to Apple Menu > About This Mac > Storage tab, you will see the new Sierra bar graph.

If you click on 'manage,' you will be taken to the new tools. While there are some truly helpful elements, like using Optimized Storage to customize what email attachments download to your Mac, most of the tools move junk from one place to another place.

Because many of these processes are automatic, Sierra users might not be aware of what the OS is doing on their behalf. If it sounds like a good idea to have macOS deciding what files to send to iCloud and what iTunes videos to remove, go for it.

For everyone else, we’d recommend turning off these tools or at least making sure you understand them fully before turning them on.

It can be challenging to check and analyze all contents of your disk space. Luckily, some tools can provide a disk scan and can save up lots of space on your Mac. Apps notarized by Apple are best for this job. CleanMyMac X, the app I talked about earlier, has a Large & Old Files feature, which finds and removes massive files stored on your Mac.

4. Change your scratch disk

If the disk being used is nearly full, change the directory for a more spacious one. Then, restart Photoshop. You can change the Scratch Disk location by pressing the Command + Option when launching Photoshop. It can be a hassle, but if you keep an eye on the available space on your scratch disk, you can do something when space is becoming limited. It’s also worth noting that problems don't just occur when the drive is completely full, hard drives should ideally never be above 85% capacity. Pass that threshold, and problems will be just around the corner.

So, you've identified rapidly depleting free space on your Mac hard drive — now what? Well, it may be a good idea to change your scratch disk to another drive in your system (just not the system drive, as that is one drive you really don't want to slow down). If you don't have another drive, you could purchase one, with SSD being the best option for Mac OS X scratch disk purposes.

Follow these steps to change your scratch disk in Photoshop:

1. Click on the Photoshop menu.
2. Go to Preferences and then Scratch Disk.
3. Tick the checkbox to select or remove a drive as the scratch disk.
4. Click OK.
5. Restart Photoshop.

You can change the Scratch Disk location by pressing Command + Option when launching Photoshop.

5. Consider buying a new SSD

The scratch disk problem happens because of 2 simple reasons: lack of RAM and lack of HDD space. Both can be addressed if you buy a Thunderbolt SSD (solid-state drive) to use as your Scratch Disk. By today’s standards, 60 GBs should be enough.

Buy an external SSD to use as a Scratch Disk. 60 GB should be enough.

6. Follow the 15% rule

Not strictly a rule, but rather a common practice states that you should keep at least 10-15% of your disk space free at all times. If your HDD size is 256 GB, your lower limit is 25 GB. You’ll have enough room to render your Photoshop files, save multiple project copies, etc.

Loud fans noise is a sign your CPU is overloaded and approaching its carrying capacity.

7. Free up RAM in Terminal

When Photoshop gets paralyzed due to lack of RAM, there is a command you can run in Terminal.

1. Open the Terminal app (find it in the Launchpad).
2. Paste in: sudo purge
3. Then, enter your password.

At first, you may not see the difference, but you’ve just flushed your RAM, releasing all the files kept in virtual memory. There are a few more ways to free up RAM; check them out too.

You can also download CleanMyMac (get a free edition here) and use its Free UP RAM command.

1. Install the app and click on Maintenance.
2. Select Free Up RAM and click Run.

You can apply this trick anytime to unfreeze an app. Also, check out the other tools in the Maintenance section. They will help you take some load off your Mac’s memory.

8. Search for hidden files in your Photoshop folder

Some projects’ leftovers are invisible and yet take up lots of space. There is a shortcut combination to display hidden files in whatever folder you are in. So, open your main Photoshop folder and press Command + Shift + Period. If you find any greyed-out folders, check their weight.

To see hidden files in any folder, press Command+Shift+Period.

As you see, there are many methods to solve the “scratch disks are full” error. There is also one more way to reorganize data on your Mac and save up some space. Disk defragmentation gathers related items and lets you delete unneeded data as well as leftovers. Note that the latest macOS doesn’t need to be defragmented as Apple has provided it with in-built utilities, which automatically remove fragmented files. So, defragmentation may only work for you if your Mac’s running the OS version earlier than OS X 10.2.

How to clear the scratch disk on Windows

If you are experiencing a “scratch disks are full” error on your Windows computer, freeing up space in the drive that accommodates the scratch disk may fix the problem. To do that, you need first to find out which drive Photoshop uses as a scratch disk.

1. Open Photoshop and go to Edit > Preferences.
2. Choose Scratch Disks.
3. Check which drive is used as a scratch disk.

The scratch disk should have at least 40GB of free space. If you see that it’s running out of space, access the drive and remove or transfer the largest files.

Another thing you may do to fix the error is clear out Photoshop temporary files. Just make sure you save your work first and close all Adobe apps. Then, go to the temp data folder
C:UsersYour UsernameAppDataLocalTemp. Look for the files that have “Photoshop Temp” in their names, highlight and remove them.

The 'Scratch Disk Is Full' error is fixed!

If you followed this guide, there is absolutely no reason why you should ever have to deal with the annoying 'scratch disk full' error again. Next time you want to create something amazing in Photoshop, you should experience something new - a Photoshop that runs so smoothly it practically purrs.

Whether you solve the problem yourself or let a great piece of software like CleanMyMac X do it for you, just make sure you clean up your scratch disk. Your Mac will thank you for it*.

*Not literally. That would be weird.

Frequently asked questions

Why does the “scratch disks are full” error may appear?

The number one reason for the “scratch disks are full” message is the lack of space in the drive where scratch disks are located. You can also run out of space in the partition of the disk allocated for Photoshop, which may also cause the above-mentioned error.

What are Photoshop temporary files?

How To Free Up Space On Your Hard Drive Macbook

Temporary files will appear if you don’t close Photoshop fully or open the Smart Object and don’t close them with the Smart Object layer. Photoshop temp files have a '.tmp' extension, so it’s easy to find them on your Mac.

How to fix the “scratch disks are full” issue?

One of the solutions is to change the scratch disk allocation. You may also need to clear the Photoshop cache and remove temporary files.