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 had two Xcode versions installed, 5 & 6. Not sure if this was the cause, but Apple indicated this does happen with people and that the appropriate action is to ensure that the correct version is 'selected'

xcode-select -p

Not sure this would have fixed the issue or not, but after removing both versions and then installing Xcode 6, things appear to have been resolved.