title: Mach-O Linker (Id) Error
body: <p>I have just added the Google Tools for Mac OAuth classes to a project and get the following linker error<img src="https://i.stack.imgur.com/Ij7gU.png" alt="enter image description here" /></p>
  <p>Any ideas what I need to do? It is an iPad app if that makes any difference.</p>
  <p>Thanks for your help :-)</p>