Hi there,
Also going to add to this - having the same problems creating C++ projects. Blueprint project creation works fine it seems.
My specs: macOS Catalina 10.15.4, Unreal Engine 4.25.1
Code below.
An error occurred while trying to generate project files.
Running Mono...
Found mono via known Mono.framework path
Running system mono/msbuild, version: Mono JIT compiler version 6.8.0.123 (2019-10/1d0d939dc30 Thu Mar 12 23:19:08 EDT 2020)
/Users/Shared/Epic Games/UE_4.25/Engine /Users/Shared/Epic Games/UE_4.25/Engine/Binaries/Mac
ERROR: Unhandled exception: System.UnauthorizedAccessException: Access to the path '/Users/my_username_here/.config/Unreal Engine/UnrealBuildTool' is denied. ---> System.IO.IOException: Permission denied
--- End of inner exception stack trace ---
at System.IO.FileSystem.CreateDirectory (System.String fullPath) [0x00191] in <f9d1b832704f410aa8ec771f4fe80552>:0
at System.IO.Directory.CreateDirectory (System.String path) [0x0002c] in <f9d1b832704f410aa8ec771f4fe80552>:0
at Tools.DotNETCommon.DirectoryReference.CreateDirectory (Tools.DotNETCommon.DirectoryReference Location) [0x00000] in <de16969af7b74ba08cc743beb47ab6b0>:0
at UnrealBuildTool.XmlConfig.CreateDefaultConfigFile (Tools.DotNETCommon.FileReference Location) [0x00006] in <a7b9effa271c41a490e2f0e242698950>:0
at UnrealBuildTool.XmlConfig.FindInputFiles () [0x00102] in <a7b9effa271c41a490e2f0e242698950>:0
at UnrealBuildTool.XmlConfig.ReadConfigFiles (Tools.DotNETCommon.FileReference OverrideCacheFile) [0x000d4] in <a7b9effa271c41a490e2f0e242698950>:0
at UnrealBuildTool.UnrealBuildTool.Main (System.String[] ArgumentsArray) [0x001d5] in <a7b9effa271c41a490e2f0e242698950>:0
Any help would be hugely appreciated - really looking forward to getting stuck in with learning Unreal Engine.
Cheers!