Collaborating on Xcode 4.x project with Xcode 5

Question

Is it possible to collaborate on a Xcode 4.x project with Xcode 5, without any compatibility problems between the two versions?

Answer 1

Yes.

There were no changes done to project file so you can safely use it on both versions same time. Xcode 5 might just prompt you for some automatic settings changes - so you should ignore that otherwise Xcode 4 might be asking again to revert those changes.

Source: Grzegorz Krukowski