Prepare to Make Unreal Games with Unreal Engine – Installing and Setting Up - Learning Unreal Engine iOS Game Development - page 9

lated to one dependency), you might need to press Alt on your Mac while merging
the files/folders and select Keep Newer to add them instead of replacing them.
7. After finishing the file merge process, you will end up with the final engine
source code files, which is approximately 6.5 GB. All that you need now is to run
the script that is responsible for generating the project files. If you are using a
Mac, which is our case, then you need to run GeneratePro-
jectFiles.command ; otherwise you can run it's Windows equivalent, Gen-
erateProjectFiles.bat .
8. This project file autogenerating process will hold for a few minutes and it will
end up adding some files to your engine's folders and directories. However, the
only one you can see and the only one you need right now to build the engine will
be in the root directory: it will be an XCode project file named
UE4.xcodeproj or a Visual Studio solution called UE4.sln on Windows.
9. Run this project in XCode 5.1 or later. Give it a while to index your project,
which might take approximately 30 minutes or less, depending on your Mac
speed. Don't be in a rush, as it might break everything if you start building to
soon. You should wait till the activity viewer bar at the top of XCode finishes in-
dexing and tells you that it is ready.
10. Now, it is time for the final step: building and running the engine. We just need to
define what exactly we are going to build. In this case, we want to build an Un-
real Engine Editor for Mac. So, we need to open the Set the active scheme menu
from the top-left corner and select the UE4Editor - Mac scheme. Now, you can
click on Build and run , and this will give you a debug build of the editor that
could be a little slow and buggy. If you want a final build that is more optimized,
efficient, and free from the debugging code, you could easily build using
Product , Build For , and finally Profiling .