title: Xcode 6: Build hangs and Interface Builder Cocoa Touch Tool starts allocating all RAM
body: <p>I’m having an issue to which I haven’t been able to find a solution just by searching here or on Google.</p>
  
  <p>I’m building a project which is shared by multiple developers. For some reason I’m the only one with this issue. I checked out the code several times and even re-installed Xcode.</p>
  
  <p>So what happens is that when I build the project the build process hangs forever. A process called “Interface Builder Cocoa Touch Tool” runs and starts accumulating RAM until it reached the Mac’s limit (which is 16 GB). At this point, as soon as I see that I kill the process and the build fails.</p>
  
  <p>On the Console App I see this:</p>
  
  <pre><code>2014-10-02 4:45:16.013 PM Interface Builder Cocoa Touch Tool[875]: BUG in libdispatch client: kevent[EVFILT_VNODE] add: "Bad file descriptor" - 0x9
  2014-10-02 4:45:17.956 PM Interface Builder Cocoa Touch Tool[875]: assertion failed: 13F34: libxpc.dylib + 29453 [75E30F22-514B-3A20-B82C-EDA43AF5C35C]: 0x8d
  </code></pre>
  
  <p>On Xcode I see the build getting stuck on “Compiling 1 of 1 story board files”, or “Compiling 1 of 1 asset catalogs”.</p>
  
  <p>Even if I stop the build, the “Interface Builder Cocoa Touch Tool” process will continue running and accumulating RAM.</p>
  
  <p>I do see two warnings related to the story board:</p>
  
  <pre><code>Base.lproj/MainStoryboard.storyboard Frame for "Scroll View" will be different at run time.
  Base.lproj/MainStoryboard.storyboard: warning: Unsupported Configuration: Prototype table cells must have reuse identifiers
  </code></pre>
  
  <p>And I see two warnings for the assets:</p>
  
  <pre><code>../Images-2.xcassets: A 57x57 app icon is required for iPhone apps targeting releases of iOS prior to 7.0
  ../Images-2.xcassets: A 57x57@2x app icon is required for iPhone apps targeting releases of iOS prior to 7.0
  </code></pre>
  
  <p>But I don’t think these are the cause.</p>
  
  <p>Here are Xcode’s and the Mac’s information:</p>
  
  <p>2.5 Ghz, Core i7 with 16 GB of Ram.
  Os X 10.9.5. Xcode 6.0.1.</p>
  
  <p>Any help is more than welcomed.</p>
  
  <p>Thanks.</p>