After writing up my Visual Studio VST guide, I figured that the Mac programmers out there might enjoy a simpler tutorial. Fortunately the process of developing VST plugins under OSX is much simpler than under Windows, but nonetheless there are a few "gotchas" along the way.
This guide assumes familiarity with Xcode and C++ development, and that you are working with Mac OSX 10.5/10.6 and have a relatively recent version of Xcode (3.2 or better). This guide only covers building VST 2.x plugins, as the 3.x SDK is not widely supported yet.