Here's something to try if none of the previous suggestions work (although use at your own risk!)... Locate your ....pbxproj file and make a copy, just in case anything messes up. Open the ....pbxproj for editing, search for productRefGroup and delete that line. Save the edit and re-open Xcode. Products directory shows back up! Summary: I'm not sure if productRefGroup is really necessary! Everything seems to build fine without it.