Chapter 1. Getting Xcode
Before You Do Anything
Xcode 4 is a tool for building applications that use features from the most recent operating systems (OS) for the Mac and iPhone/iPad. To the first readers of this book, that means Mac OS X 10.6 and 10.7; and iOS 5.1. Xcode 4 doesn’t support earlier software-development kits (SDKs) or PowerPC. (And you cannot test PowerPC apps on a Lion machine.)
If you need to use earlier SDKs, you must use Xcode 3.2 on a Mac booted from a 10.6 partition. Users have reported that Xcode 3.2.6 seems not to crash on Lion, but it won’t install on a Lion system, so you must install Xcode 3 before you upgrade to Lion. Apple doesn’t support ...
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