Issue Building anything with 5.5 (Launcher) on macOS

Development Getting Started & Setup
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Running 5.5 (Launcher version) on macOS Sequoia 15.1.1 M3 Max. I have Xcode 16.1 setup with visionOS and iOS components and getting the follow SDK errors. Unable to build for any platform (macOS, iOS, visionOS YES I HAVE THE TARGET PLATFORMS OF iOS and visionOS installed for Unreal Engine able to Build on ue-main Build from Source (5.6).

LogTurnkeySupport: Warning: Turnkey failed to run properly, full Turnkey output:
Running AutomationTool...
Setting up bundled DotNet SDK
.../Engine/Build/BatchFiles/Mac/../../../Binaries/ThirdParty/DotNet/8.0.300/mac-arm64
Start UAT Non-Interactively: dotnet AutomationTool.dll -ScriptsForProject=.../AVP55L_TEST.uproject Turnkey -utf8output -WaitForUATMutex -command=VerifySdk -ReportFilename=.../TurnkeyReport_1.log -log=.../TurnkeyLog_1.log -project=.../AVP55L_TEST.uproject -Device=IOS@[device_id]+Mac@[device_name]
Starting AutomationTool...
Parsing command line: -ScriptsForProject=".../AVP55L_TEST.uproject" Turnkey -utf8output -WaitForUATMutex -command=VerifySdk -ReportFilename=".../TurnkeyReport_1.log" -log=".../TurnkeyLog_1.log" -project=".../AVP55L_TEST.uproject" -Device=IOS@[device_id]+Mac@[device_name]
Initializing script modules...
Total script module initialization time: 0.37 s.
Using .../Engine/Binaries/ThirdParty/DotNet/8.0.300/mac-arm64/dotnet
System.UnauthorizedAccessException: Access to the path '.../Application Support/Epic/UnrealEngine' is denied.
 ---> System.IO.IOException: Permission denied
   --- End of inner exception stack trace ---
   at System.IO.FileSystem.CreateDirectory(String fullPath, UnixFileMode unixCreateMode)
   at System.IO.Directory.CreateDirectory(String path)
   at EpicGames.Core.DirectoryReference.CreateDirectory(DirectoryReference location) in .../EpicGames.Core/DirectoryReference.cs:line 280
   at UnrealBuildTool.XmlConfig.ReadConfigFiles(...) in .../XmlConfig.cs:line 165
   at UnrealBuildTool.PlatformExports.Initialize(...) in .../PlatformExports.cs:line 155
   at AutomationTool.Automation.ProcessAsync(...) in .../Automation.cs:line 123
(see .../LocalBuildLogs/Log.txt for full exception trace)
AutomationTool executed for 0h 0m 0s
AutomationTool exiting with ExitCode=1 (Error_Unknown)
RunUAT ERROR: AutomationTool was unable to run successfully. Exited with code: 1

I am attempting to build for visionOS AND have the Target Platforms installed yet still get these errors

UPDATE 10 Dec 2024 I tried 5.5.1 and even installed Unreal 5.5.1 and Xcode on another Mac (M1 Mac mini) same issue. Applies to even 5.3.2 as well. I believe it is a Turnkey permission / execution issue.

Screenshot 2024-11-26 at 7.51.42 PM
Screenshot 2024-11-26 at 7.51.42 PM1448×802 46.9 KB

Screenshot_2024-11-12_at_3.55.57_PM
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Screenshot 2024-11-26 at 7.53.55 PM
Screenshot 2024-11-26 at 7.53.55 PM1322×1008 75.2 KB

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I’m having the same problem. I though the 5.5.1 update would solve the issue but it doesn’t not.

1 Like
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Yea Update is I tried 5.5.1 and even installed Unreal 5.5.1 and Xcode on another Mac (M1 Mac mini) same issue. Applies to even 5.3.2 as well. I believe it is a Turnkey permission / execution issue.

4

Looking at the compatibility charts it appears that xcode 16.1 is not supported yet :frowning:

1 Like
5

I’ve been having the same issue for a while, testing new versions of UE, Xcode and macOS as they come out.
Currently I have Unreal Engine 5.5.3, Xcode 16.2, macOS Sequoia and can’t build existing projects or create new ones.

There was mention above of a compatibility chart, where do I find that? and will going to an older version of Xcode solve the issue?

Does anyone have a work around for this? Other than move to another engine :wink:

2 Likes
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Has anyone tried building the engine from source?

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Yes, these problems in the original post is exclusive to Launcher version of Unreal Engine on macOS Sequoia. GitHub versions work (at least for me)