Mono error?

I’m a noob and I want to learn c++ via Unreal Engine, but I seem to be getting this error:

An error occurred while trying to generate project files.

Running Mono…

Setting up Mono
/Users/Shared/UnrealEngine/4.13/Engine /Users/Shared/UnrealEngine/4.13/Engine/Binaries/Mac
Discovering modules, targets and source code for project…
Compiling with non-standard Xcode (xcode-select): /Library/Developer/CommandLineTools/
Triggered an exception while looking for SDK directory in
System.IO.DirectoryNotFoundException: Directory ‘/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs’ not found.
at System.IO.Directory.ValidateDirectoryListing (System.String path, System.String searchPattern, System.Boolean& stop) [0x00000] in :0
at System.IO.Directory.GetFileSystemEntries (System.String path, System.String searchPattern, FileAttributes mask, FileAttributes attrs) [0x00000] in :0
at System.IO.Directory.GetDirectories (System.String path, System.String searchPattern) [0x00000] in :0
at System.IO.Directory.GetDirectories (System.String path) [0x00000] in :0
at UnrealBuildTool.AppleToolChain.SelectSDK (System.String BaseSDKDir, System.String OSPrefix, System.String& PlatformSDKVersion, Boolean bVerbose) [0x00000] in :0
ERROR: Invalid SDK MacOSX.sdk, not found in /Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs


Hello Cameron Field,

What version of XCode / Mac OS / MacOSX SDK are you using? Have you checked to see if the files that XCode is having issues finding are present on your computer? In either case, I would suggest reinstalling your MacOSX SDK to see if that may help.

We haven’t heard from you in a while, Cameron Field. Are you still experiencing this issue? If so, have you tried what I mentioned in my previous comment? In the meantime, I’ll be marking this as resolved for tracking purposes.