Xcode 6: Build hangs and Interface Builder Cocoa Touch Tool starts allocating all RAM

Question

I’m having an issue to which I haven’t been able to find a solution just by searching here or on Google.

I’m building a project which is shared by multiple developer

Answer 1

I was getting the same "Compiling Storyboards" or "Compiling Asset Catalog" hang under Xcode 7.3.1. Activity Monitor showed multiple "Interface Builder Cocoa Touch Tool" processes running.

I was able to continue by:

1. Closing the offending storyboard
2. Closing the project
3. Restarting Xcode, but do not open the project
4. Open just the offending storyboard
5. Closing the storyboard and restarting Xcode
6. Open the project