After upgrade to OSX Mavericks, and reinstall xcode, if
make some project, You’ll get the error a bit more…
“Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.”
Ah! Ok, X-code was obviously re-installed with OSX Mavericks.
sudo xcodebuild -license
This allowed me to view the X-code licence, and then agree to the terms. Voila, that’s it. Everything worked just fine after that.