Trouble incorporating admob to a estimote application

Hi, I'm having trouble trying to add ad banners to an application using the estimote SDK, is there any know trouble, the error is :

framework not found Metal for architecture armv7

There is a known issue where trying to use a library built with Xcode 6 (like our Estimote SDK) with Xcode 5 results in this error.

You can read a detailed description here:

We don't know when/if Apple's going to address this one—the easiest workaround is to upgrade to Xcode 6.