You may wonder what scratch disk is when you can't open Photoshop because of the scratch disk error. The error says 'could not initialize photoshop because the scratch disks are full'.
Adobe has discovered the compatibility issues listed below with running Photoshop CC 2018 (and earlier) with macOS 10.14 Mojave. Adobe strongly recommends that customers update to the Photoshop 2019 release prior to updating to macOS 10.14 Mojave. If both Photoshop and the Creative cloud desktop app are up to date, I'd recommend you to try the steps listed in this article Solve Adobe Photoshop problems and issues by keeping it up-to-date and let us know if they help.
Also, similar errors such as 'could not complete your request because the scratch disks are full', 'could not use the type tool because the scratch disks are full' are also bothering Photoshop users when they are trying to crop an image or make another editing in Photoshop.
In this post, you'll learn what scratch disk really is and how to fix the Photoshop scratch disk full on Windows and Mac. There are permanent fixes to make the error gone for good.
Why Is Photoshop Saying My Scratch Disks Are Full?
What is a scratch disk? A scratch disk on PC/Mac is the hard drive that Photoshop use as virtual memory to store temporary files when there is not enough RAM for the temp files. When you are opening or working on a huge project in Photoshop, there could be lots of temp files. When there is no room in both the RAM and the scratch disk for the Photoshop temporary files, the 'scratch disk full' error is triggered.
Some of you may notice that Photoshop shows scratch disk is full even when there is a lot of free space on your computer. That's because not all of your free space on a hard drive is assigned as scratch disks for Photoshop.
To fix the Photoshop scratch disk full error on Windows or Mac, there are mainly 2 kinds of solutions: one is to clear scratch disk to free up more space; the other is to assign more scratch disk space for Photoshop. Read on for the specific steps to fix the errors.
1. Change/Increase Scratch Disks
Since the drive that is used as the scratch disk of Photoshop is currently full, you can change the scratch disk settings to allow Photoshop to use more memory space. You can either change the scratch disk to a drive with more space or select multiple drives as scratch disks. Here is what you should do.
If Photoshop is running right now, go to Preferences > Scratch Disk. You will see all the drives that are available on your computer. Select another drive with more space or tick multiple drives for scratch disks. Click OK to save the change.
If Photoshop can't open, start Photoshop and at the same time, hold down CMD + OPTION keys on Mac(CTRL + ALT keys on Windows), which will bring up the following Scratch Disks Preference menu. Select another disk for the First scratch disk or add another drive as the second/third/forth scratch disk. Click OK.
Tips
- You should not use a removable or network drive for a scratch disk.
- To ensure the best performance of Photoshop on your computer, you are recommended to select a fast drive as a scratch disk and avoid using the system drive of your Windows or Mac OS.
Now restart Photoshop and the program should be able to initiate without error.
2. Clear your Photoshop cache
Some users found that clearing caches of Photoshop help to fix the scratch disk full error. Photoshop allows you to purge cached data from the Edit menu.
Step 1: On Photoshop, click Edit > Purge.
Step 2: There are 4 types of caches you can clean.
Step 3: Select one of the caches(undo, clipboard, histories, video cache) to clean or click All to remove all caches.
Tip: If a cache item is greyed out, it means that there is no such kind of cache files on your computer.
You should know that after clearing caches of Photoshop, you are unable to restore to the previous version of your project.
If Photoshop can't open because the scratch disks are full, you can clean up Photoshop cache with a cleanup tool.
If you are using Photoshop on a Mac, FonePaw MacMaster can help you clear app caches without opening Photoshop.
- Run MacMaster.Click System Junk > Scan.Select App Cache > Photoshop and clean its cache.
Learn more at How to Safely Clear App Caches on Mac.
3. Delete temp files
Photoshop may create massive temp files on your Windows or Mac, which is the culprit why the scratch disks are full. You can manually delete temporary files of Photoshop to empty the scratch disk.
On Mac
Method 1: Open Spotlight and enter 'Photoshop Temp' to search for the temp files in the entire hard drive. The Photoshop temporary files are started with '~PST' or 'Photoshop Temp' and ended with the file extension '.tmp'.
Photoshop Wont Open Mac
Method 2: Launch Terminal, enter the command 'open /tmp' and hit Enter, which will open the temp folder. Now find the temp files of Photoshop and delete them.
On Windows
You can navigate to the location of temp files on Photoshop in the following path:
- C:/ > Users > 'YourUser' > AppData > Local > Temp.
After the temp files are removed, run Photoshop to check if the scratch disks full error is gone. Arq 5 0 4 download free.
4. Clear disk space
If your hard drive has low disk space, it is time for you to clean up the drive to reclaim more free space so that Photoshop can run smoothly without a problem.
If you have a Mac computer, FonePaw MacMaster can help you clear disk space by cleaning the following files.
- Play mpg files on mac. System caches, logs, user logs;
- Duplicate photos and files;
- Large and old files;
- iTunes junk files;
- Unneeded apps and app data;..
You can restore lots of free space on Mac by simply clicking the Clean button on MacMaster.
Once there is enough free space on your computer, scratch disks should have enough room to run Photoshop without errors.
5. Defragment hard disk
Some users fix the scratch disks full error by defragmenting the hard disk. If Photoshop is telling the scratch disks are full while there is still enough free space on your computer, you can defragment the hard disk to get contiguous, unfragmented space for Photoshop. However, you don't need to defragment your computer if the computer is using an SSD. Only the mechanical drive needs to be defragmented.
Windows provides a built-in disk optimization tool - Defragment and Optimize Drives for you to easily defragment your drives. You usually don't need to defrag a Mac as most of them run on SSD drive.
6. Increase the RAM allowed by Photoshop
After you have fixed the scratch disks full error in Photoshop, you can stop the error from happening again by assigning more RAM for the program. Here is how to do that.
Step 1: Click Edit > Preferences > Performance.
Step 2: Move the sliders to increase the RAM memory that you let Photoshop use, although the RAM the Photoshop can use should not be over 80%.
One more tip: Fix 'scratch disk full' error when cropping an image
If you get the 'scratch disk full' error when cropping an image in Photoshop, it is likely that you have entered the wrong values for the size and resolution, for example, enter 1080 x 1920 when the unit is set as inches, which force Photoshop to create a file that is too large in size, thus the 'scratch disk full' error is triggered.
Photoshop requires massive storage space to run smoothly. To ensure the best performance of Photoshop, clean your Mac or PC on a regular basis is a good way to go.
This article lists known compatibility issues that you may encounter when running Photoshop on macOS 10.14 (Mojave) and provides known workarounds.
Adobe has discovered the compatibility issues listed below with running Photoshop CC 2018 (and earlier) with macOS 10.14 Mojave.
Adobe strongly recommends that customers update to the Photoshop 2019 release prior to updating to macOS 10.14 Mojave. Older versions of Photoshop were not designed, nor extensively tested to run on macOS Mojave. Additionally, we strongly recommend that customers do their own testing on a non-production partition to ensure that new operating systems work with their current hardware and drivers (printing, etc). You may wish to remain on an older version of the OS that is compatible with prior versions of our software.
If you do encounter issues not already documented, feel free to report them on our feedback site.
Versions affected | Photoshop CC 2018 or earlier |
Operating system | macOS 10.14 Mojave |
Adobe has discovered the compatibility issue listed below when running Photoshop CC 2018 and earlier releases on macOS 10.14 Mojave.
Pen pressure does not work and busy cursor displays while painting
Workaround (Earlier versions)
If you launch Photoshop CC 2018 (and earlier) after updating to macOS 10.14, you will be presented with the following dialog:
Adobe Photoshop would like to control this computer using accessibility features. Grant access to this application in Security & Privacy preferences, located in System Preferences.
If you click Deny, you observe the following problems when using Photoshop:
- Pen pressure does not work
- The Busy cursor displays while painting
Instead, follow the steps below:
- Click the lock to make changes, then enter your system user name and password for your computer.
- Select Privacy from the top set of tabs, then select Accessibility from the left-hand column of options.
- Click the + (plus) button under the list 'Allow the apps below to control your computer'.
- Navigate to the Applications folder and select the Photoshop application and click Open.The System Preferences dialog setting for Photoshop should look similar to the image below with Photoshop added and checked:
- Click the lock to prevent further changes. Relaunch Photoshop.
Black artifacts on image after using the Liquify filter
After you use the Liquify filter on an image on a specific Mac hardware/graphics cards, there are unexpected black pixels on the image.
You are running macOS 10.14.0, 10.14.2, or 10.14.3.
Macs with the following graphics cards are affected:
- AMD Radeon HD - FirePro D300
- AMD Radeon HD - FirePro D500
- AMD Radeon HD - FirePro D700
- AMD Radeon R9 M290
- AMD Radeon R9 M370
- AMD Radeon R9 M390
Workarounds:
Update to macOS Mojave 10.14.4.
or
Run Liquify without graphics acceleration:
- Hold down the Option key when you select Filter > Liquifyto disable the Use Graphics Processor option when launching the Liquify dialog.
- Disable the Use Graphics Processor option in the preferences.
- Choose Photoshop > Preferences > Performance.
- Deselect Use Graphics Processor.
- Quit and relaunch Photoshop.
We are working with Apple to address this issue.
Epson ICC printer profiles are missing in Photoshop after updating to macOS Mojave.
To resolve this issue, reset the printing system in your Mac's system preferences and then add your Epson printer again.
- Reset the printing system.For instructions, refer to Apple's support documentation: https://support.apple.com/en-us/HT203343#reset
- Add your Epson printer again.For instructions, refer to Apple's macOS Mojave User Guide documentation: Add a printer on Mac
Dark Appearance setting doesn't affect all of the User Interface
When you enable Dark Mode appearance in the macOS System Preferences > General dialog, not all of Photoshop's UI changes to reflect the Dark setting. The Application menus inherit the Dark Mode setting but the following elements do not:
- The application frame and panels
- Photoshop dialogs
- Pop-up menus
- Panel Menus
- Context Menus
- OS dialogs, such as Open.. and the Apple Color Picker
Photoshop has its own settings for controlling the application frame, panels and Photoshop dialogs. To have these user interface elements better match the Dark Mode appearance:
- Go to Preferences > Interface.
- Set the Color Theme to the darkest setting.
Note: Pop-up, panel and context menus, as well as OS dialogs, such as Open and the Apple Color Picker, are unaffected by this setting.
When you click on the Share icon in the far right of the Options bar to share an image, Facebook, Twitter, etc are no longer an option in the menu.
Photoshop uses the macOS APIs for sharing and these options have been removed in Mojave.
Photos App Won't Open Mac
Save For Web settings are not retained between sessions
When you quit and relaunch Photoshop, your last used settings in Save For Web are not preserved. Adobe's engineering team is investigating this issue.
Photoshop Won't Open Files
Crash with only Dark Menu Bar and Dock terminal command
See Photoshop crashes due to dark menu bar and dock only terminal command.