Uhhm, if youre trying to port something that requires Carbon then youre out of luck. Carbon is a MacOSX only framework. Even if you find the header, it will fail when trying to link it because the libraries do not exist. There is no version of Carbon that is compiled for arm. You would either have to find a way to configure it to build without Carbon, edit the code to use a different framework than Carbon, or just give up and find something else to port.