After I create a new Scene Kit Template Project (which compiles perfectly), and then add an image from my system to the art.scenassets folder, I get this error: Command /usr/bin/codesign failed with exit code 1.
( Note: The file in this case is a .png.)
Nevertheless, after I remove the image file and clean the project and confim the project does compile.. Then, when I add a different .png file (from the Apple Demo project (BadgerAdvancedRenderinginSceneKit)) the scene compiles, perfectly.
I'm guessing my image contains some incompatable metadata, based on some iCloud reference on my system. I say this because I have other issues, that seem to be related to iCloud being on my system.