How to modify xcode452 for vectorworks2014 development
From Vectorworks Developer
Vectorworks 2014 requires Xcode 4.5.2 for SDK development. It also requires the Mac OS X 10.6 SDK which is not included in Xcode 4.5.2.
To incorporate the 10.6 SDK into Xcode 4.5.2, copy the 10.6 SDK from a previous version of Xcode into Xcode 4.5.2 at the following location: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs
For example, Xcode 3.2.5 installs the 10.6 SDK in '/Developer/SDKs'