Yosemite Fix

Anyone using Yosemite should be using Xcode 6.1 Beta 2, which is just called Xcode-Beta.app. Xcode 6.0.x doesn't contain the 10.10 SDK, and anyone using Xcode6-Beta4 is *way* out of date. You can grab the latest Xcode 6.1 Beta [here](https://developer.apple.com/xcode/downloads/).