Which version(s) of Xcode are supported?

I’m using Unity 3.4 (OS X trial version) and I’m wondering what version(s) of Xcode are officially supported to use with Unity3D?

It looks like iOS SDK 4.3 is the latest (non-beta) and Xcode 4.1.

So… should I be using Xcode 4.1 with Unity3D 3.4?

Thanks!

i use the lastest beta of xcode and it works fine