Answer by nes_tle

Hi I'm having the same problem, but new import does not fix it for me. I'm using unity 3.5 0f5 and xCode 4.3.2 When building the xCode Project out of Unity, the Finder should report, that the Game Center Plugin has been successfully integrated. But it doesn't. I think it maybe, that unity does not have the connection to xCode, since there is no Developer Folder in the root directory. Any help would be much appreciated.