Where does Xcode 4 store Scheme Data?
Solution 1:
Finally found the answer on somebody's Twitter. Schemes are stored per user by default, but if you go to Manage Schemes and click the "Shared" checkbox on the far right for each one, they'll show up in the xcshareddata directory instead of your xcuserdata directory, where they'll be seen and used by everyone. Hopefully this will help someone else trying to figure out the same thing!