Mike, thanks for mentioning that. I am about to upgrade to Mavericks myself and will make sure I check that LC is pointing to the right Xcode. What about the SDK? Mark -- View this message in context: http://runtime-revolution.278305.n4.nabble.com/OS-X-Mavericks-tp4671455p4683735.html Sent from the Revolution - User mailing list archive at Nabble.com.