[Solved] How to Fix Photoshop Error “Could not save as FILENAME because the file is already in use or was left open by another application”

Adobe Photoshop CS5 and CS6 unable to save file and prompt below error: Could not save as FILENAME because the file is already in use or was left open by another application. Photoshop CS6 is running on macOS Mojave. In macOS Mojave, there are problems saving files within Photoshop CS 6 & 5 due to incompatibility with APFS. Try to follow the below steps to create a virtual disk and save in it.

"Could not save as FILENAME because the file is already in use or was left open by another application" Error
“Could not save as FILENAME because the file is already in use or was left open by another application” Error

Content Summary

Save the file in the new disk image
Close Finder
Uncheck Save in Background option

Save the file in the new disk image

Step 1: Open Disk Utility > File > New Image > Blank Image.

Create new blank image
Create a new blank image

Step 2: Give the virtual volume a useful name, set the size big enough to edit images or batches of images, but small enough to fit onto the machine. Check the virtual disk format is Mac OS Extended.

Check virtual disk parameters
Check virtual disk parameters

Close Finder

On macOS Mojave, this issue seems to revolve around the thumbnail display in the Finder. Check if you have a folder open with that file clicked or selected, the image is displayed as a preview in the Finder. Selecting any other file or closing the folder may fix it.

Uncheck Save in Background option

Step 1: Open Photoshop, and choose Edit > Preferences > File Handling.

Step 2: Uncheck Save in Background option.

Published by Thomas Apel

, a dynamic and self-motivated information technology architect, with a thorough knowledge of all facets pertaining to system and network infrastructure design, implementation and administration. I enjoy the technical writing process and answering readers' comments included.