If I compile the code with Xcode using the “Deployment” build style on a Core 2 Duo machine (with SDKs 10.2.8-10.4u installed), will it run correctly on a Core Duo machine?
Yes, the build settings for the Deployment build should allow you to compile on any Mac system.
OK, so the machine type that I compile it on (I’m compiling on a Core 2 Duo) doesn’t make a difference, correct?
For deployment builds that is correct. For development builds however it will be architecture (PPC vs Intel) dependent.