Steam Integration & Packaging Error

I am trying to set up a steam subsystem by altering the defaultengine.ini to start testing a project I’m working on using the “generic shooter” pack (blueprints only). This is the tutorial I have been trying to follow: http://allarsblog.com/2016/02/26/BasicSteamIntegration/
I run into an unknown error when trying to package the game, and I believe enabling the steam subsystem started the errors. I have successfully packaged the project and used it on a LAN connection. Any help successfully packaging the build and also with steam integration would be greatly appreciated!

Here is the output log outputlog - Google Docs

I see a couple issues in your log. I believe the real failure is this error:

ERROR: Invalid SDK MacOSX.sdk, not found in /Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs

I’m not a Mac guy, but some quick googling suggests you can fix this by installing XCode.

I also see your steam dlls are not loading correctly

LogOnline:Display: STEAM: Loading Steam SDK 1.32

LogMac:Warning: dlopen failed: dlopen(/Users/Shared/Epic Games/UE_4.13/Engine/Binaries/Mac/UE4Editor.app /Contents/MacOS/libsteam_api.dylib, 5): image not found

LogOnline:Warning: STEAM: Steam SDK 1.32 libraries not present at or failed to load!

That error suggests the files are just missing.

Thank you that sounds about right. I have Xcode because I needed it to package the game initially. I sort of figured it had to do with the steam sdk, but I though that I had that downloaded and in the right place. Could you possibly explain which steam sdk I need and how I need to use it?