Current Available Quick-Fix Solutions

General Announcements
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Since the launch of Unreal Engine, we have been working as quickly as possible to resolve important issues as they have been reported to us. Once an important fix has been made, we sometimes respond directly to the affected users by providing a QFE (“Quick Fix Engineering”) which we share here on the forums.

These QFEs eventually get rolled into the hotfixes and major version release updates that we provide for all, but until those updates we want to make sure that they are available to the select users who need them.

  • Please be aware that QFEs should only be used by the individuals who are experiencing the select issue; they do not provide any additional features or improvements for other users.
  • QFEs are for the binary editor from the Epic Games Launcher. Github users can update from the Release branch to get the current fixes.

Available QFEs in latest Engine version

5/8/2024 - Version 5.4.1 - Fixes UE-213478: Subversion (SVN) consistently fails to connect on 5.4 and later

4/26/2024 - Version 5.4 - Fixes issue where build fails when verifying that the entire VisualStudio solution can be built in an Installed Build workspace. ` error CS0103: The name 'Catch2' does not exist in the current context`


QFEs for Previous Releases

11/28/2022 - Version 5.1 - Engine - Addresses multiple issues with Mac builds in UE 5.1

Fixed in this QFE:

  • Removed Apple Silicon from default build architectures if installed from Epic Games Launcher, as it is not yet supported in UE 5.1 as a default option.
    • Apple Silicon native build will be available in UE 5.1 through Epic Games Launcher at a later time, but for now please build from GitHub
  • Fixed a Mobile Preview crash on Mac when Mobile Deferred is enabled and Preview Rendering Level set to iOS Shader 3.1
  • Fixed issue that was preventing movable lights from properly casting light on Mac

QFE Files:

Note, if you have been prompted with “UnrealQFEInstaller.app is damaged and can’t be opened”, please try running the following command in Terminal:

sudo xattr -r -d com.apple.quarantine ~/Downloads/UnrealQFEInstaller.app

11/17/2022 - Version 5.0.3 - Engine - Addresses compilation issues with the Mac and Windows platforms

This QFE contains a Windows Remote Mac compile fix that occurs when a newer version of iTunes for Windows is installed than what is supported by 5.0.3. It will display a popup with the message:

The SDK for iOS is not installed properly, which is needed to generate data. Check the SDK section of the Launch On menu in the main toolbar to update SDK

The version check has been updated to allow the current iTunes for Windows and for most future iTunes releases.

This QFE resolves compatibility issues between Unreal Engine 5.0.3 and Xcode 14.1 or newer. In particular, compiling error redefinition of enumerator 'HTTP_STATUS_' and some warnings have been resolved.


10/14/2022 - Version 5.0.3 - Engine - Platform Mac is not a valid platform to build error with Xcode 14

Note, some users may still experience the following error:

Cannot code sign because the target does not have an Info.plist file and one is not being generated automatically. Apply an Info.plist file to the target using the INFOPLIST_FILE build setting or generate one automatically by setting the GENERATE_INFOPLIST_FILE build setting to YES (recommended).

To workaround this issue, first make sure you’ve updated your engine with the QFE. Then, open the Terminal and run the following command:

./../Shared/Epic\ Games/UE_5.0/Engine/Build/BatchFiles/Mac/GenerateProjectFiles.sh -game -project="fullpath/to/uproject/file"

The value passed into the “-project” argument should be the full path of your uproject file, and the first part of the command may need to be changed if your Unreal Engine is installed in a different folder.

Warning: This will discard any custom Xcode project settings, please back up your .xcodeproj files if needed. Your code won’t be affected.

3/9/2018 - Version 4.18.3 - Engine - Removed usage of MTLDebugDevice private API in shipping builds

7/11/2016 - Version 4.11.2 - Engine - Fixes compile issue when attempting to use Visual 2015 Update 3

2/6/15 - Version 4.6.1 - Engine - Fixes issue where editor incorrectly detected that iTunes wasn't installed and would not allow any iOS Launch On or Package.

2/10/15 - Version 4.5.1 - Engine - Fixes issue where editor incorrectly detected that iTunes wasn't installed and would not allow any iOS Launch On or Package.

7/31/14 - Version 4.3.1 - Engine - Fixes a crash that occurs with Blueprints that have soft and hard dependencies.

Issue reported here: [https://answers.unrealengine.com/que...coverable.html](https://answers.unrealengine.com/questions/70620/42-urgent-help-needed-unrecoverable.html)

7/31/14 - Version 4.2.1 - Engine - Fixes a crash that occurs with Blueprints that have soft and hard dependencies.

Issue reported here: https://answers.unrealengine.com/que…coverable.html

4/17/14 - **Version 4.0.2** - Launcher - Launcher fails to launch after install on Mac; can't read some info about mouse

Issue reported here: https://answers.unrealengine.com/questions/30577/unreal-engine-install-launcher-fails-osx.html

Download these two files:

When you get them, install Unreal Engine app from UnrealEngine_QFE_2039063.dmg to your /Applications folder, then open Terminal app and type:

  • open /Applications/Unreal\ Engine.app --args -noselfupdate

-noselfupdate argument is important because without it the app would update to official version that doesn’t work for you. After you download the engine using Unreal Engine app, unzip QFE-FromCL-2034640-Shelve-2048959. and run the patch installer it contains. After that you should be able to use the editor etc. You can start the editor by launching it directly: /Users/Shared/UnrealEngine/4.0/Engine/Binaries/MacUE4Editor.app.
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If you experience any issue with a QFE you have applied, please reach out to us atforums.unrealengine.com/c/development-discussion/getting-started/installation-and-setup/127. Thanks!

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This thread has been updated with a QFE to resolve a 4.2 Mac SVN issue.

Update: QFE was rolled into the 4.2.1 hotfix

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This thread has been updated with a QFE to resolve a 4.2.1 Blueprint crash with dependencies.

UPDATE: Also, the same fix is now available for 4.3.1

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This thread has been updated with a QFE to resolve a 4.6.0 crash caused by non-ASCII characters.

Update: QFE was rolled into the 4.6.1 hotfix.

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This thread has been updated with a QFE to resolve a 4.6.1 issue with Launching and Packaging for iOS.

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This thread has been updated with a QFE to resolve the issue with Launching and Packaging for iOS for 4.5.1.

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This thread has been updated with a QFE to resolve an error while attempting to submit apps to the Apple store on Mac for 4.9.1.

Update: QFE was rolled into 4.9.2 hotfix

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This thread has been updated with a QFE to resolve the compile issue when using Visual 2015 Update 3 on 4.11.2.

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This thread has been updated with a QFE for 4.13.1 to resolve an Android Google Play security alert.

Update: QFE was rolled into the 4.13.2 hotfix

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This thread has been updated with a QFE for 4.14.1 to resolve frequent crashes with the error message Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - ‘HUNG’) as reported in UE-37999 & UE-38818.

Update: QFE was rolled into the 4.14.2 hotfix

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This thread has been updated with a QFE for 4.14.2 to resolve a frequent crash when importing FBX as reported in UE-40229

Update: QFE was rolled into the 4.14.3 hotfix

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This thread has been updated with a QFE for 4.17.0 to resolve a UBT crash that causes failure to compile on incremental builds, reported as UE-48197

Update: QFE was rolled into the 4.17.1 hotfix

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This thread has been updated with a QFE for 4.18.3 to remove usage of MTLDebugDevice private API in shipping builds.

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This thread has been updated with a QFE for 5.0.3 to resolve the “Platform Mac is not a valid platform to build” error with Xcode 14.

1 Like
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This topic has been updated with a QFE for 5.0.3 to resolve compilation issues for Mac and Windows platforms.

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This topic has been updated with a QFE for 5.1 to fix multiple issues with Mac builds in UE 5.1:

  • Removed Apple Silicon from default build architectures if installed from Epic Games Launcher, as it is not yet supported in UE 5.1 as a default option.
    • Apple Silicon native build will be available in UE 5.1 through Epic Games Launcher at a later time, but for now please build from GitHub
  • Fixed a Mobile Preview crash on Mac when Mobile Deferred is enabled and Preview Rendering Level set to iOS Shader 3.1
  • Fixed issue that was preventing movable lights from properly casting light on Mac
1 Like
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This topic has been updated with a QFE for 5.4 to fix build fails when verifying that the entire VisualStudio solution can be built in an Installed Build workspace. error CS0103: The name 'Catch2' does not exist in the current context

1 Like
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We’ve updated this topic with a QFE for 5.4.1 to fix an issues where Subversion (SVN) consistently fails to connect on 5.4 and later.

1 Like