Compiling for Gear vR on Mac?

Just updated to 4.8 and tried to build on latest Mac OS an app for Gear VR.

But the automation software it tries to run toward the end is a PC app? (.exe)

Program.Main: ERROR: Exception in AutomationTool: Command failed (Result:5): /Users/Shared/UnrealEngine/4.8/Engine/Binaries/DotNET/UnrealBuildTool.exe VRTest1 Android Development …

Are there additional flags to set to get basic compiling to work on a Mac?

Could you post a complete log? (or at least, the whole error you get?)
I think it’s ok that you see a .exe app launched, it’s a DotNET app and is run through the mono framework on mac and linux (this is how the whole build system works), so this shouldn’t be the cause.

Are you building a c++ or blueprint project?

C++ as per the documents. I’ve set up a test system and will try a reloaded version of 4.8