I continue to have the problem that Geezus wrote about here:
https://forums.developer.apple.com/message/178039#178039
And although part of the problem is resolved by KMT's suggestion to
Try:
execute "xattr -rc ." both in DerivedData directory and Project directory
That workaround only works for me when I'm building for a simulator or attached device.
But when I try to Archive so I can load to TestFlight/iTunes Conect, the origianl problem persists:
resource fork, Finder information, or similar detritus not allowed
Command /usr/bin/codesign failed with exit code 1
I understand the original thread is closed, but since I'm still having trouble, I hope someone can offer additional help.