Having the same problem, done all the "total clean of cocoa pods and derived data".In my case it only effects applications which uses the CSV.swift framework and it's only from that it complains.warning: Swift error in fallback scratch context: <module-includes>:1:9: note: in file included from <module-includes>:1:#import "Headers/CSV.swift-umbrella.h" ^error: /Users/totte/Documents/projects/Projects for Asset TV/GroupTime/GroupTime/Pods/Target Support Files/CSV.swift/CSV.swift-umbrella.h:2:9: error: 'Cocoa/Cocoa.h' file not found#import <Cocoa/Cocoa.h> ^/Users/totte/Documents/projects/Projects for Asset TV/GroupTime/GroupTime/Pods/Target Support Files/CSV.swift/CSV.swift-umbrella.h:2:9: note: did not find header 'Cocoa.h' in framework 'Cocoa' (loaded from '/System/Library/Frameworks')#import <Cocoa/Cocoa.h> ^error: could not build Objective-C module 'CSV'note: This error message is displayed only once. If the error displayed above is due to conflicting search paths to Clang modules in different images of the debugged executable, this can slow down debugging of Swift code significantly, since a fresh Swift context has to be created every time a conflict is encountered.Anyone has any more ideas? Do the framework needs changes?