-You already need to have Xcode 3.0 or later installed. Apple's developer package Xcode includes basic developer tools, such as the make utility and a C compiler. Without these installed, the installation of the Glasgow Haskell Compiler will fail.\
+You already need to have Xcode 3.0 or later, on Leopard, or Xcode 2.4 or later, on Tiger, installed. Apple's developer package Xcode includes basic developer tools, such as the make utility and a C compiler. Without these installed, the installation of the Glasgow Haskell Compiler will fail.\